diff --git a/src/artifact_cache/artifact_cache.c b/src/artifact_cache/artifact_cache.c
index 1e0b647f..b06098b8 100644
--- a/src/artifact_cache/artifact_cache.c
+++ b/src/artifact_cache/artifact_cache.c
@@ -13,8 +13,11 @@ ac_init(void)
   ac_shared->cache_slots_count = 256;
   ac_shared->cache_slots = push_array(arena, AC_Cache *, ac_shared->cache_slots_count);
   ac_shared->cache_stripes = stripe_array_alloc(arena);
-  ac_shared->req_mutex = mutex_alloc();
-  ac_shared->req_arena = arena_alloc();
+  for EachElement(idx, ac_shared->req_batches)
+  {
+    ac_shared->req_batches[idx].mutex = mutex_alloc();
+    ac_shared->req_batches[idx].arena = arena_alloc();
+  }
 }
 
 ////////////////////////////////
@@ -23,6 +26,8 @@ ac_init(void)
 internal AC_Artifact
 ac_artifact_from_key_(Access *access, String8 key, AC_ArtifactParams *params, U64 endt_us)
 {
+  AC_RequestBatch *req_batch = &ac_shared->req_batches[params->flags & AC_Flag_HighPriority ? 0 : 1];
+  
   //- rjf: create function -> cache
   AC_Cache *cache = 0;
   {
@@ -76,7 +81,7 @@ ac_artifact_from_key_(Access *access, String8 key, AC_ArtifactParams *params, U6
     {
       if(str8_match(n->key, key, 0))
       {
-        if(ins_atomic_u64_eval(&n->completion_count) != 0 && (n->gen == params->gen || !params->wait_for_fresh))
+        if(ins_atomic_u64_eval(&n->completion_count) != 0 && (n->gen == params->gen || !(params->flags & AC_Flag_WaitForFresh)))
         {
           got_artifact = 1;
           artifact_is_stale = (n->gen == params->gen);
@@ -129,18 +134,27 @@ ac_artifact_from_key_(Access *access, String8 key, AC_ArtifactParams *params, U6
         // TODO(rjf): string allocator for keys
         node->key = str8_copy(stripe->arena, key);
         node->working_count = 1;
+        node->evict_threshold_us = params->evict_threshold_us;
       }
       
       // rjf: request
       if(need_request)
       {
         need_request = 0;
-        MutexScope(ac_shared->req_mutex)
+        MutexScope(req_batch->mutex)
         {
-          AC_RequestNode *n = push_array(ac_shared->req_arena, AC_RequestNode, 1);
-          SLLQueuePush(ac_shared->first_req, ac_shared->last_req, n);
-          ac_shared->req_count += 1;
-          n->v.key = str8_copy(ac_shared->req_arena, key);
+          AC_RequestNode *n = push_array(req_batch->arena, AC_RequestNode, 1);
+          if(params->flags & AC_Flag_Wide)
+          {
+            SLLQueuePush(req_batch->first_wide, req_batch->last_wide, n);
+            req_batch->wide_count += 1;
+          }
+          else
+          {
+            SLLQueuePush(req_batch->first_thin, req_batch->last_thin, n);
+            req_batch->thin_count += 1;
+          }
+          n->v.key = str8_copy(req_batch->arena, key);
           n->v.gen = params->gen;
           n->v.create = params->create;
         }
@@ -149,7 +163,7 @@ ac_artifact_from_key_(Access *access, String8 key, AC_ArtifactParams *params, U6
       }
       
       // rjf: get value from node, if possible
-      if(!got_artifact && ins_atomic_u64_eval(&node->completion_count) != 0 && ((node->gen == params->gen) || !params->wait_for_fresh || out_of_time))
+      if(!got_artifact && ins_atomic_u64_eval(&node->completion_count) != 0 && ((node->gen == params->gen) || !(params->flags & AC_Flag_WaitForFresh) || out_of_time))
       {
         got_artifact = 1;
         artifact_is_stale = (node->gen == params->gen);
@@ -185,7 +199,9 @@ ac_async_tick(void)
 {
   Temp scratch = scratch_begin(0, 0);
   
+  //////////////////////////////
   //- rjf: do eviction pass across all caches
+  //
   for EachIndex(cache_slot_idx, ac_shared->cache_slots_count)
   {
     Stripe *cache_stripe = stripe_from_slot_idx(&ac_shared->cache_stripes, cache_slot_idx);
@@ -206,7 +222,7 @@ ac_async_tick(void)
               for(AC_Node *n = slot->first, *next = 0; n != 0; n = next)
               {
                 next = n->next;
-                if(access_pt_is_expired(&n->access_pt) && ins_atomic_u64_eval(&n->working_count) == 0)
+                if(access_pt_is_expired(&n->access_pt, .time = n->evict_threshold_us) && ins_atomic_u64_eval(&n->working_count) == 0)
                 {
                   slot_has_work = 1;
                   if(!write_mode)
@@ -236,90 +252,216 @@ ac_async_tick(void)
     }
   }
   
-  //- rjf: gather all requests
-  local_persist AC_Request *reqs = 0;
-  local_persist U64 reqs_count = 0;
-  if(lane_idx() == 0) MutexScope(ac_shared->req_mutex)
+  //////////////////////////////
+  //- rjf: gather requests
+  //
+  typedef struct RequestBatchTask RequestBatchTask;
+  struct RequestBatchTask
   {
-    reqs_count = ac_shared->req_count;
-    reqs = push_array(scratch.arena, AC_Request, reqs_count);
-    U64 idx = 0;
-    for EachNode(r, AC_RequestNode, ac_shared->first_req)
+    AC_Request *wide;
+    U64 wide_count;
+    AC_Request *thin;
+    U64 thin_count;
+  };
+  RequestBatchTask *tasks = 0;
+  U64 tasks_count = 0;
+  if(lane_idx() == 0)
+  {
+    tasks_count = 2;
+    tasks = push_array(scratch.arena, RequestBatchTask, tasks_count);
+    for EachElement(task_idx, ac_shared->req_batches)
     {
-      MemoryCopyStruct(&reqs[idx], &r->v);
-      reqs[idx].key = str8_copy(scratch.arena, reqs[idx].key);
-      idx += 1;
+      AC_RequestBatch *batch = &ac_shared->req_batches[task_idx];
+      MutexScope(batch->mutex)
+      {
+        tasks[task_idx].wide_count = batch->wide_count;
+        tasks[task_idx].thin_count = batch->thin_count;
+        tasks[task_idx].wide = push_array(scratch.arena, AC_Request, tasks[task_idx].wide_count);
+        tasks[task_idx].thin = push_array(scratch.arena, AC_Request, tasks[task_idx].thin_count);
+        {
+          U64 idx = 0;
+          for EachNode(n, AC_RequestNode, batch->first_wide)
+          {
+            MemoryCopyStruct(&tasks[task_idx].wide[idx], &n->v);
+            tasks[task_idx].wide[idx].key = str8_copy(scratch.arena, tasks[task_idx].wide[idx].key);
+            idx += 1;
+          }
+        }
+        {
+          U64 idx = 0;
+          for EachNode(n, AC_RequestNode, batch->first_thin)
+          {
+            MemoryCopyStruct(&tasks[task_idx].thin[idx], &n->v);
+            tasks[task_idx].thin[idx].key = str8_copy(scratch.arena, tasks[task_idx].thin[idx].key);
+            idx += 1;
+          }
+        }
+        arena_clear(batch->arena);
+        batch->first_wide = batch->last_wide = batch->first_thin = batch->last_thin = 0;
+        batch->wide_count = batch->thin_count = 0;
+      }
     }
-    arena_clear(ac_shared->req_arena);
-    ac_shared->first_req = ac_shared->last_req = 0;
-    ac_shared->req_count = 0;
   }
-  lane_sync();
+  lane_sync_u64(&tasks, 0);
+  lane_sync_u64(&tasks_count, 0);
   
-  //- rjf: do all requests on all lanes
-  for EachIndex(idx, reqs_count)
+  //////////////////////////////
+  //- rjf: do all requests
+  //
+  for EachIndex(task_idx, tasks_count)
   {
     lane_sync();
+    RequestBatchTask *task = &tasks[task_idx];
     
-    // rjf: compute val
-    B32 retry = 0;
-    AC_Artifact val = reqs[idx].create(reqs[idx].key, &retry);
-    
-    // rjf: retry? -> resubmit request
-    if(retry && lane_idx() == 0)
+    //- rjf: do all wide requests for this priority
+    ProfScope("wide requests (p%I64u)", task_idx)
     {
-      MutexScope(ac_shared->req_mutex)
+      for EachIndex(idx, task->wide_count)
       {
-        AC_RequestNode *n = push_array(ac_shared->req_arena, AC_RequestNode, 1);
-        SLLQueuePush(ac_shared->first_req, ac_shared->last_req, n);
-        ac_shared->req_count += 1;
-        MemoryCopyStruct(&n->v, &reqs[idx]);
-        n->v.key = str8_copy(ac_shared->req_arena, n->v.key);
-      }
-      ins_atomic_u32_eval_assign(&async_loop_again, 1);
-    }
-    
-    // rjf: create function -> cache
-    AC_Cache *cache = 0;
-    if(!retry)
-    {
-      U64 cache_hash = u64_hash_from_str8(str8_struct(&reqs[idx].create));
-      U64 cache_slot_idx = cache_hash%ac_shared->cache_slots_count;
-      Stripe *cache_stripe = stripe_from_slot_idx(&ac_shared->cache_stripes, cache_slot_idx);
-      RWMutexScope(cache_stripe->rw_mutex, 0)
-      {
-        for(AC_Cache *c = ac_shared->cache_slots[cache_slot_idx]; c != 0; c = c->next)
+        AC_Request *r = &task->wide[idx];
+        
+        // rjf: compute val
+        B32 retry = 0;
+        AC_Artifact val = r->create(r->key, &retry);
+        
+        // rjf: retry? -> resubmit request
+        if(retry && lane_idx() == 0)
         {
-          if(c->create == reqs[idx].create)
+          AC_RequestBatch *batch = &ac_shared->req_batches[task_idx];
+          MutexScope(batch->mutex)
           {
-            cache = c;
-            break;
+            AC_RequestNode *n = push_array(batch->arena, AC_RequestNode, 1);
+            SLLQueuePush(batch->first_wide, batch->last_wide, n);
+            batch->wide_count += 1;
+            MemoryCopyStruct(&n->v, r);
+            n->v.key = str8_copy(batch->arena, n->v.key);
           }
+          ins_atomic_u32_eval_assign(&async_loop_again, 1);
+        }
+        
+        // rjf: create function -> cache
+        AC_Cache *cache = 0;
+        if(!retry)
+        {
+          U64 cache_hash = u64_hash_from_str8(str8_struct(&r->create));
+          U64 cache_slot_idx = cache_hash%ac_shared->cache_slots_count;
+          Stripe *cache_stripe = stripe_from_slot_idx(&ac_shared->cache_stripes, cache_slot_idx);
+          RWMutexScope(cache_stripe->rw_mutex, 0)
+          {
+            for(AC_Cache *c = ac_shared->cache_slots[cache_slot_idx]; c != 0; c = c->next)
+            {
+              if(c->create == r->create)
+              {
+                cache = c;
+                break;
+              }
+            }
+          }
+        }
+        
+        // rjf: write value into cache
+        if(!retry && lane_idx() == 0)
+        {
+          U64 hash = u64_hash_from_str8(r->key);
+          U64 slot_idx = hash%cache->slots_count;
+          AC_Slot *slot = &cache->slots[slot_idx];
+          Stripe *stripe = stripe_from_slot_idx(&cache->stripes, slot_idx);
+          RWMutexScope(stripe->rw_mutex, 1)
+          {
+            for(AC_Node *n = slot->first; n != 0; n = n->next)
+            {
+              if(str8_match(n->key, r->key, 0))
+              {
+                n->gen = r->gen;
+                n->val = val;
+                ins_atomic_u64_dec_eval(&n->working_count);
+                ins_atomic_u64_inc_eval(&n->completion_count);
+              }
+            }
+          }
+          cond_var_broadcast(stripe->cv);
         }
       }
     }
     
-    // rjf: write value into cache
-    if(!retry && lane_idx() == 0)
+    //- rjf: do all thin requests for this priority
+    ProfScope("thin requests (p%I64u)", task_idx)
     {
-      U64 hash = u64_hash_from_str8(reqs[idx].key);
-      U64 slot_idx = hash%cache->slots_count;
-      AC_Slot *slot = &cache->slots[slot_idx];
-      Stripe *stripe = stripe_from_slot_idx(&cache->stripes, slot_idx);
-      RWMutexScope(stripe->rw_mutex, 1)
+      U64 req_take_counter = 0;
+      U64 *req_take_counter_ptr = 0;
+      if(lane_idx() == 0)
       {
-        for(AC_Node *n = slot->first; n != 0; n = n->next)
+        req_take_counter_ptr = &req_take_counter;
+      }
+      lane_sync_u64(&req_take_counter_ptr, 0);
+      for(;;)
+      {
+        U64 req_idx = ins_atomic_u64_inc_eval(req_take_counter_ptr) - 1;
+        if(req_idx >= task->thin_count) { break; }
+        AC_Request *r = &task->thin[req_idx];
+        
+        // rjf: compute val
+        B32 retry = 0;
+        AC_Artifact val = r->create(r->key, &retry);
+        
+        // rjf: retry? -> resubmit request
+        if(retry)
         {
-          if(str8_match(n->key, reqs[idx].key, 0))
+          AC_RequestBatch *batch = &ac_shared->req_batches[task_idx];
+          MutexScope(batch->mutex)
           {
-            n->gen = reqs[idx].gen;
-            n->val = val;
-            ins_atomic_u64_dec_eval(&n->working_count);
-            ins_atomic_u64_inc_eval(&n->completion_count);
+            AC_RequestNode *n = push_array(batch->arena, AC_RequestNode, 1);
+            SLLQueuePush(batch->first_thin, batch->last_thin, n);
+            batch->thin_count += 1;
+            MemoryCopyStruct(&n->v, r);
+            n->v.key = str8_copy(batch->arena, n->v.key);
+          }
+          ins_atomic_u32_eval_assign(&async_loop_again, 1);
+        }
+        
+        // rjf: create function -> cache
+        AC_Cache *cache = 0;
+        if(!retry)
+        {
+          U64 cache_hash = u64_hash_from_str8(str8_struct(&r->create));
+          U64 cache_slot_idx = cache_hash%ac_shared->cache_slots_count;
+          Stripe *cache_stripe = stripe_from_slot_idx(&ac_shared->cache_stripes, cache_slot_idx);
+          RWMutexScope(cache_stripe->rw_mutex, 0)
+          {
+            for(AC_Cache *c = ac_shared->cache_slots[cache_slot_idx]; c != 0; c = c->next)
+            {
+              if(c->create == r->create)
+              {
+                cache = c;
+                break;
+              }
+            }
           }
         }
+        
+        // rjf: write value into cache
+        if(!retry)
+        {
+          U64 hash = u64_hash_from_str8(r->key);
+          U64 slot_idx = hash%cache->slots_count;
+          AC_Slot *slot = &cache->slots[slot_idx];
+          Stripe *stripe = stripe_from_slot_idx(&cache->stripes, slot_idx);
+          RWMutexScope(stripe->rw_mutex, 1)
+          {
+            for(AC_Node *n = slot->first; n != 0; n = n->next)
+            {
+              if(str8_match(n->key, r->key, 0))
+              {
+                n->gen = r->gen;
+                n->val = val;
+                ins_atomic_u64_dec_eval(&n->working_count);
+                ins_atomic_u64_inc_eval(&n->completion_count);
+              }
+            }
+          }
+          cond_var_broadcast(stripe->cv);
+        }
       }
-      cond_var_broadcast(stripe->cv);
     }
   }
   lane_sync();
diff --git a/src/artifact_cache/artifact_cache.h b/src/artifact_cache/artifact_cache.h
index 4f219dfd..2f874679 100644
--- a/src/artifact_cache/artifact_cache.h
+++ b/src/artifact_cache/artifact_cache.h
@@ -19,6 +19,15 @@ struct AC_Artifact
 typedef AC_Artifact AC_CreateFunctionType(String8 key, B32 *retry_out);
 typedef void AC_DestroyFunctionType(AC_Artifact artifact);
 
+typedef U32 AC_Flags;
+typedef enum AC_FlagsEnum
+{
+  AC_Flag_WaitForFresh = (1<<0),
+  AC_Flag_HighPriority = (1<<1),
+  AC_Flag_Wide = (1<<2),
+}
+AC_FlagsEnum;
+
 typedef struct AC_ArtifactParams AC_ArtifactParams;
 struct AC_ArtifactParams
 {
@@ -26,8 +35,9 @@ struct AC_ArtifactParams
   AC_DestroyFunctionType *destroy;
   U64 slots_count;
   U64 gen;
-  B32 wait_for_fresh;
+  U64 evict_threshold_us;
   B32 *stale_out;
+  AC_Flags flags;
 };
 
 ////////////////////////////////
@@ -63,6 +73,7 @@ struct AC_Node
   AccessPt access_pt;
   U64 working_count;
   U64 completion_count;
+  U64 evict_threshold_us;
 };
 
 typedef struct AC_Slot AC_Slot;
@@ -86,6 +97,19 @@ struct AC_Cache
   StripeArray stripes;
 };
 
+typedef struct AC_RequestBatch AC_RequestBatch;
+struct AC_RequestBatch
+{
+  Mutex mutex;
+  Arena *arena;
+  AC_RequestNode *first_wide;
+  AC_RequestNode *last_wide;
+  AC_RequestNode *first_thin;
+  AC_RequestNode *last_thin;
+  U64 wide_count;
+  U64 thin_count;
+};
+
 typedef struct AC_Shared AC_Shared;
 struct AC_Shared
 {
@@ -97,11 +121,7 @@ struct AC_Shared
   StripeArray cache_stripes;
   
   // rjf: requests
-  Mutex req_mutex;
-  Arena *req_arena;
-  AC_RequestNode *first_req;
-  AC_RequestNode *last_req;
-  U64 req_count;
+  AC_RequestBatch req_batches[2]; // 0: high priority, 1: low priority
 };
 
 ////////////////////////////////
@@ -118,7 +138,7 @@ internal void ac_init(void);
 //~ rjf: Cache Lookups
 
 internal AC_Artifact ac_artifact_from_key_(Access *access, String8 key, AC_ArtifactParams *params, U64 endt_us);
-#define ac_artifact_from_key(access, key, create_fn, destroy_fn, endt_us, ...) ac_artifact_from_key_((access), (key), &(AC_ArtifactParams){.create = (create_fn), .destroy = (destroy_fn), __VA_ARGS__}, (endt_us))
+#define ac_artifact_from_key(access, key, create_fn, destroy_fn, endt_us, ...) ac_artifact_from_key_((access), (key), &(AC_ArtifactParams){.create = (create_fn), .destroy = (destroy_fn), .evict_threshold_us = (2000000), __VA_ARGS__}, (endt_us))
 
 ////////////////////////////////
 //~ rjf: Asynchronous Tick
diff --git a/src/base/base_thread_context.c b/src/base/base_thread_context.c
index 45ea750d..3e12a8b9 100644
--- a/src/base/base_thread_context.c
+++ b/src/base/base_thread_context.c
@@ -213,13 +213,13 @@ access_touch(Access *access, AccessPt *pt, CondVar cv)
 //- rjf: access points
 
 internal B32
-access_pt_is_expired(AccessPt *pt)
+access_pt_is_expired_(AccessPt *pt, AccessPtExpireParams *params)
 {
   U64 access_refcount = ins_atomic_u64_eval(&pt->access_refcount);
   U64 last_time_touched_us = ins_atomic_u64_eval(&pt->last_time_touched_us);
   U64 last_update_idx_touched = ins_atomic_u64_eval(&pt->last_update_idx_touched);
   B32 result = (access_refcount == 0 &&
-                last_time_touched_us + 2000000 < os_now_microseconds() &&
-                last_update_idx_touched + 10 < update_tick_idx());
+                last_time_touched_us + params->time < os_now_microseconds() &&
+                last_update_idx_touched + params->update_idxs < update_tick_idx());
   return result;
 }
diff --git a/src/base/base_thread_context.h b/src/base/base_thread_context.h
index 1a49a005..5b1726be 100644
--- a/src/base/base_thread_context.h
+++ b/src/base/base_thread_context.h
@@ -27,6 +27,13 @@ struct AccessPt
   U64 last_update_idx_touched;
 };
 
+typedef struct AccessPtExpireParams AccessPtExpireParams;
+struct AccessPtExpireParams
+{
+  U64 time;
+  U64 update_idxs;
+};
+
 typedef struct Touch Touch;
 struct Touch
 {
@@ -112,7 +119,8 @@ internal void access_close(Access *access);
 internal void access_touch(Access *access, AccessPt *pt, CondVar cv);
 
 //- rjf: access points
-internal B32 access_pt_is_expired(AccessPt *pt);
+internal B32 access_pt_is_expired_(AccessPt *pt, AccessPtExpireParams *params);
+#define access_pt_is_expired(pt, ...) access_pt_is_expired_((pt), &(AccessPtExpireParams){.time = 2000000, .update_idxs = 10, __VA_ARGS__})
 
 //- rjf: progress counters
 #define set_progress_ptr(ptr) (tctx_selected()->progress_counter_ptr = (ptr))
diff --git a/src/ctrl/ctrl_core.c b/src/ctrl/ctrl_core.c
index c9d04747..2dd0c65f 100644
--- a/src/ctrl/ctrl_core.c
+++ b/src/ctrl/ctrl_core.c
@@ -7467,7 +7467,6 @@ internal AC_Artifact
 ctrl_memory_artifact_create(String8 key, B32 *retry_out)
 {
   AC_Artifact artifact = {0};
-  if(lane_idx() == 0)
   {
     //- rjf: unpack key
     CTRL_Handle process = {0};
@@ -7591,10 +7590,6 @@ ctrl_memory_artifact_create(String8 key, B32 *retry_out)
     StaticAssert(sizeof(content_key) == sizeof(artifact), artifact_key_size_check);
     MemoryCopyStruct(&artifact, &content_key);
   }
-  lane_sync_u64(&artifact.u64[0], 0);
-  lane_sync_u64(&artifact.u64[1], 0);
-  lane_sync_u64(&artifact.u64[2], 0);
-  lane_sync_u64(&artifact.u64[3], 0);
   return artifact;
 }
 
@@ -7618,7 +7613,10 @@ ctrl_key_from_process_vaddr_range_new(CTRL_Handle process, Rng1U64 vaddr_range,
   } key_data = {process, vaddr_range, zero_terminated};
   String8 key = str8_struct(&key_data);
   Access *access = access_open();
-  AC_Artifact artifact = ac_artifact_from_key(access, key, ctrl_memory_artifact_create, ctrl_memory_artifact_destroy, endt_us, .gen = ctrl_mem_gen(), .slots_count = 2048, .stale_out = out_is_stale);
+  AC_Artifact artifact = ac_artifact_from_key(access, key, ctrl_memory_artifact_create, ctrl_memory_artifact_destroy, endt_us,
+                                              .gen = ctrl_mem_gen(),
+                                              .slots_count = 2048,
+                                              .stale_out = out_is_stale);
   C_Key content_key = {0};
   MemoryCopyStruct(&content_key, &artifact);
   access_close(access);
@@ -7633,7 +7631,6 @@ internal AC_Artifact
 ctrl_call_stack_artifact_create(String8 key, B32 *retry_out)
 {
   AC_Artifact artifact = {0};
-  if(lane_idx() == 0)
   {
     Temp scratch = scratch_begin(0, 0);
     
@@ -7785,8 +7782,6 @@ ctrl_call_stack_artifact_create(String8 key, B32 *retry_out)
     
     scratch_end(scratch);
   }
-  lane_sync_u64(&artifact.u64[0], 0);
-  lane_sync_u64(&artifact.u64[1], 0);
   return artifact;
 }
 
@@ -7805,7 +7800,10 @@ ctrl_call_stack_from_thread_new(Access *access, CTRL_Handle thread_handle, B32 h
 {
   CTRL_CallStack result = {0};
   {
-    AC_Artifact artifact = ac_artifact_from_key(access, str8_struct(&thread_handle), ctrl_call_stack_artifact_create, ctrl_call_stack_artifact_destroy, endt_us, .gen = ctrl_mem_gen() + ctrl_reg_gen());
+    AC_Artifact artifact = ac_artifact_from_key(access, str8_struct(&thread_handle), ctrl_call_stack_artifact_create, ctrl_call_stack_artifact_destroy, endt_us,
+                                                .gen = ctrl_mem_gen() + ctrl_reg_gen(),
+                                                .evict_threshold_us = 10000000,
+                                                .flags = high_priority ? AC_Flag_HighPriority : 0);
     if(artifact.u64[1] != 0)
     {
       MemoryCopyStruct(&result, (CTRL_CallStack *)artifact.u64[1]);
diff --git a/src/dbg_engine/dbg_engine_core.c b/src/dbg_engine/dbg_engine_core.c
index c44c70e6..1203a9c6 100644
--- a/src/dbg_engine/dbg_engine_core.c
+++ b/src/dbg_engine/dbg_engine_core.c
@@ -1208,13 +1208,13 @@ d_query_cached_rip_from_thread_unwind(CTRL_Entity *thread, U64 unwind_count)
   }
   else
   {
-    CTRL_Scope *ctrl_scope = ctrl_scope_open();
-    CTRL_CallStack callstack = ctrl_call_stack_from_thread(ctrl_scope, thread->handle, 1, 0);
+    Access *access = access_open();
+    CTRL_CallStack callstack = ctrl_call_stack_from_thread_new(access, thread->handle, 1, 0);
     if(callstack.concrete_frames_count != 0)
     {
       result = regs_rip_from_arch_block(thread->arch, callstack.concrete_frames[unwind_count%callstack.concrete_frames_count]->regs);
     }
-    ctrl_scope_close(ctrl_scope);
+    access_close(access);
   }
   return result;
 }
@@ -1886,10 +1886,10 @@ d_tick(Arena *arena, D_TargetArray *targets, D_BreakpointArray *breakpoints, D_P
               case D_CmdKind_StepOverLine: {traps = d_trap_net_from_thread__step_over_line(scratch.arena, thread);}break;
               case D_CmdKind_StepOut:
               {
-                CTRL_Scope *ctrl_scope = ctrl_scope_open();
+                Access *access = access_open();
                 
                 // rjf: thread => call stack
-                CTRL_CallStack callstack = ctrl_call_stack_from_thread(ctrl_scope, thread->handle, 1, os_now_microseconds()+10000);
+                CTRL_CallStack callstack = ctrl_call_stack_from_thread_new(access, thread->handle, 1, os_now_microseconds()+10000);
                 
                 // rjf: use first unwind frame to generate trap
                 if(callstack.concrete_frames_count > 1)
@@ -1904,7 +1904,7 @@ d_tick(Arena *arena, D_TargetArray *targets, D_BreakpointArray *breakpoints, D_P
                   good = 0;
                 }
                 
-                ctrl_scope_close(ctrl_scope);
+                access_close(access);
               }break;
             }
             if(good && traps.count != 0)
diff --git a/src/disasm/disasm.c b/src/disasm/disasm.c
index e2d8f743..56a9572f 100644
--- a/src/disasm/disasm.c
+++ b/src/disasm/disasm.c
@@ -512,7 +512,7 @@ dasm_info_from_hash_params(Access *access, U128 hash, DASM_Params *params)
     String8 key = str8_list_join(scratch.arena, &key_parts, 0);
     
     // rjf: get info
-    AC_Artifact artifact = ac_artifact_from_key(access, key, dasm_artifact_create, dasm_artifact_destroy, 0, .gen = fs_change_gen());
+    AC_Artifact artifact = ac_artifact_from_key(access, key, dasm_artifact_create, dasm_artifact_destroy, 0, .gen = fs_change_gen(), .flags = AC_Flag_Wide);
     DASM_Artifact *dasm_artifact = (DASM_Artifact *)artifact.u64[0];
     if(dasm_artifact)
     {
diff --git a/src/file_stream/file_stream.c b/src/file_stream/file_stream.c
index eb2fc240..e170f367 100644
--- a/src/file_stream/file_stream.c
+++ b/src/file_stream/file_stream.c
@@ -244,7 +244,7 @@ fs_key_from_path_range(String8 path, Rng1U64 range, U64 endt_us)
     }
     
     //- rjf: map to artifact
-    AC_Artifact artifact = ac_artifact_from_key(access, key, fs_artifact_create, fs_artifact_destroy, endt_us, .gen = gen);
+    AC_Artifact artifact = ac_artifact_from_key(access, key, fs_artifact_create, fs_artifact_destroy, endt_us, .gen = gen, .flags = AC_Flag_Wide);
     MemoryCopyStruct(&result, &artifact);
   }
   access_close(access);
diff --git a/src/raddbg/raddbg_core.c b/src/raddbg/raddbg_core.c
index a0caab90..e8b579e2 100644
--- a/src/raddbg/raddbg_core.c
+++ b/src/raddbg/raddbg_core.c
@@ -1816,8 +1816,8 @@ rd_eval_space_read(void *u, E_Space space, void *out, Rng1U64 range)
         }break;
         case CTRL_EntityKind_Thread:
         {
-          CTRL_Scope *ctrl_scope = ctrl_scope_open();
-          CTRL_CallStack call_stack = ctrl_call_stack_from_thread(ctrl_scope, entity->handle, 1, rd_state->frame_eval_memread_endt_us);
+          Access *access = access_open();
+          CTRL_CallStack call_stack = ctrl_call_stack_from_thread_new(access, entity->handle, 1, rd_state->frame_eval_memread_endt_us);
           U64 concrete_frame_idx = e_interpret_ctx->reg_unwind_count;
           if(concrete_frame_idx < call_stack.concrete_frames_count)
           {
@@ -1829,7 +1829,7 @@ rd_eval_space_read(void *u, E_Space space, void *out, Rng1U64 range)
             MemoryCopy(out, (U8 *)f->regs + read_range.min, read_size);
             result = (read_size == dim_1u64(range));
           }
-          ctrl_scope_close(ctrl_scope);
+          access_close(access);
         }break;
       }
     }break;
@@ -6464,12 +6464,12 @@ rd_window_frame(void)
           // rjf: unwind
           if(ctrl_entity->kind == CTRL_EntityKind_Thread) RD_Font(RD_FontSlot_Code)
           {
-            CTRL_Scope *ctrl_scope = ctrl_scope_open();
+            Access *access = access_open();
             Vec4F32 code_color = ui_color_from_name(str8_lit("code_default"));
             Vec4F32 symbol_color = ui_color_from_name(str8_lit("code_symbol"));
             CTRL_Entity *process = ctrl_entity_ancestor_from_kind(ctrl_entity, CTRL_EntityKind_Process);
             B32 call_stack_high_priority = ctrl_handle_match(ctrl_entity->handle, rd_base_regs()->thread);
-            CTRL_CallStack call_stack = ctrl_call_stack_from_thread(ctrl_scope, ctrl_entity->handle, call_stack_high_priority, call_stack_high_priority ? rd_state->frame_eval_memread_endt_us : 0);
+            CTRL_CallStack call_stack = ctrl_call_stack_from_thread_new(access, ctrl_entity->handle, call_stack_high_priority, call_stack_high_priority ? rd_state->frame_eval_memread_endt_us : 0);
             if(call_stack.frames_count != 0)
             {
               ui_spacer(ui_em(1.5f, 1.f));
@@ -6486,7 +6486,7 @@ rd_window_frame(void)
               String8 rip_value_string = rd_value_string_from_eval(scratch.arena, str8_zero(), &string_params, ui_top_font(), ui_top_font_size(), ui_top_font_size()*40.f, rip_eval);
               rd_code_label(1, 0, code_color, rip_value_string);
             }
-            ctrl_scope_close(ctrl_scope);
+            access_close(access);
           }
           
         }break;
@@ -16258,9 +16258,9 @@ rd_frame(void)
           }break;
           case RD_CmdKind_SelectUnwind:
           {
-            CTRL_Scope *ctrl_scope = ctrl_scope_open();
+            Access *access = access_open();
             CTRL_Entity *thread = ctrl_entity_from_handle(&d_state->ctrl_entity_store->ctx, rd_base_regs()->thread);
-            CTRL_CallStack call_stack = ctrl_call_stack_from_thread(ctrl_scope, thread->handle, 1, os_now_microseconds()+10000);
+            CTRL_CallStack call_stack = ctrl_call_stack_from_thread_new(access, thread->handle, 1, os_now_microseconds()+10000);
             CTRL_CallStackFrame *frame = ctrl_call_stack_frame_from_unwind_and_inline_depth(&call_stack, rd_regs()->unwind_count, rd_regs()->inline_depth);
             if(frame == 0)
             {
@@ -16272,14 +16272,14 @@ rd_frame(void)
               rd_state->base_regs.v.inline_depth = rd_regs()->inline_depth;
             }
             rd_cmd(RD_CmdKind_FindThread, .thread = thread->handle, .unwind_count = rd_state->base_regs.v.unwind_count, .inline_depth = rd_state->base_regs.v.inline_depth);
-            ctrl_scope_close(ctrl_scope);
+            access_close(access);
           }break;
           case RD_CmdKind_UpOneFrame:
           case RD_CmdKind_DownOneFrame:
           {
-            CTRL_Scope *ctrl_scope = ctrl_scope_open();
+            Access *access = access_open();
             CTRL_Entity *thread = ctrl_entity_from_handle(&d_state->ctrl_entity_store->ctx, rd_base_regs()->thread);
-            CTRL_CallStack call_stack = ctrl_call_stack_from_thread(ctrl_scope, thread->handle, 1, os_now_microseconds()+10000);
+            CTRL_CallStack call_stack = ctrl_call_stack_from_thread_new(access, thread->handle, 1, os_now_microseconds()+10000);
             CTRL_CallStackFrame *current_frame = ctrl_call_stack_frame_from_unwind_and_inline_depth(&call_stack, rd_regs()->unwind_count, rd_regs()->inline_depth);
             CTRL_CallStackFrame *next_frame = current_frame;
             if(current_frame != 0) switch(kind)
@@ -16303,7 +16303,7 @@ rd_frame(void)
                      .unwind_count = next_frame->unwind_count,
                      .inline_depth = next_frame->inline_depth);
             }
-            ctrl_scope_close(ctrl_scope);
+            access_close(access);
           }break;
           
           //- rjf: meta controls
diff --git a/src/raddbg/raddbg_views.c b/src/raddbg/raddbg_views.c
index 16614e77..69267dec 100644
--- a/src/raddbg/raddbg_views.c
+++ b/src/raddbg/raddbg_views.c
@@ -1026,11 +1026,11 @@ rd_watch_row_info_from_row(Arena *arena, EV_Row *row)
       CTRL_Entity *entity = rd_ctrl_entity_from_eval_space(block_eval.space);
       if(entity->kind == CTRL_EntityKind_Thread)
       {
-        CTRL_Scope *ctrl_scope = ctrl_scope_open();
+        Access *access = access_open();
         info.callstack_thread = entity;
         U64 frame_num = ev_block_num_from_id(block, key.child_id);
         B32 call_stack_high_priority = ctrl_handle_match(entity->handle, rd_base_regs()->thread);
-        CTRL_CallStack call_stack = ctrl_call_stack_from_thread(ctrl_scope, entity->handle, call_stack_high_priority, call_stack_high_priority ? rd_state->frame_eval_memread_endt_us : 0);
+        CTRL_CallStack call_stack = ctrl_call_stack_from_thread_new(access, entity->handle, call_stack_high_priority, call_stack_high_priority ? rd_state->frame_eval_memread_endt_us : 0);
         if(1 <= frame_num && frame_num <= call_stack.frames_count)
         {
           CTRL_CallStackFrame *f = &call_stack.frames[frame_num-1];
@@ -1038,7 +1038,7 @@ rd_watch_row_info_from_row(Arena *arena, EV_Row *row)
           info.callstack_inline_depth = f->inline_depth;
           info.callstack_vaddr = regs_rip_from_arch_block(entity->arch, f->regs);
         }
-        ctrl_scope_close(ctrl_scope);
+        access_close(access);
       }
     }
     
@@ -2930,10 +2930,10 @@ RD_VIEW_UI_FUNCTION_DEF(memory)
   };
   AnnotationList *visible_memory_annotations = push_array(scratch.arena, AnnotationList, visible_memory_size);
   {
-    CTRL_Scope *ctrl_scope = ctrl_scope_open();
+    Access *access = access_open();
     CTRL_Entity *selected_thread = ctrl_entity_from_handle(&d_state->ctrl_entity_store->ctx, rd_regs()->thread);
     CTRL_Entity *selected_process = ctrl_entity_ancestor_from_kind(selected_thread, CTRL_EntityKind_Process);
-    CTRL_CallStack selected_call_stack = ctrl_call_stack_from_thread(ctrl_scope, selected_thread->handle, 1, 0);
+    CTRL_CallStack selected_call_stack = ctrl_call_stack_from_thread_new(access, selected_thread->handle, 1, 0);
     CTRL_Entity *eval_process = &ctrl_entity_nil;
     if(eval.space.kind == RD_EvalSpaceKind_CtrlEntity)
     {
@@ -3203,7 +3203,7 @@ RD_VIEW_UI_FUNCTION_DEF(memory)
       }
     }
     
-    ctrl_scope_close(ctrl_scope);
+    access_close(access);
   }
   
   //////////////////////////////
diff --git a/src/raddbg/raddbg_widgets.c b/src/raddbg/raddbg_widgets.c
index 64ea699e..ccffbfef 100644
--- a/src/raddbg/raddbg_widgets.c
+++ b/src/raddbg/raddbg_widgets.c
@@ -547,12 +547,12 @@ rd_title_fstrs_from_ctrl_entity(Arena *arena, CTRL_Entity *entity, B32 include_e
   {
     Vec4F32 symbol_color = ui_color_from_name(str8_lit("code_symbol"));
     dr_fstrs_push_new(arena, &result, &params, str8_lit(" "));
-    CTRL_Scope *ctrl_scope = ctrl_scope_open();
+    Access *access = access_open();
     DI_Scope *di_scope = di_scope_open();
     CTRL_Entity *process = ctrl_entity_ancestor_from_kind(entity, CTRL_EntityKind_Process);
     Arch arch = entity->arch;
     B32 call_stack_high_priority = ctrl_handle_match(entity->handle, rd_base_regs()->thread);
-    CTRL_CallStack call_stack = ctrl_call_stack_from_thread(ctrl_scope, entity->handle, call_stack_high_priority, call_stack_high_priority ? rd_state->frame_eval_memread_endt_us : 0);
+    CTRL_CallStack call_stack = ctrl_call_stack_from_thread_new(access, entity->handle, call_stack_high_priority, call_stack_high_priority ? rd_state->frame_eval_memread_endt_us : 0);
     B32 did_first_known = 0;
     for(U64 idx = 0, limit = 10;
         idx < call_stack.frames_count && idx < limit;
@@ -592,7 +592,7 @@ rd_title_fstrs_from_ctrl_entity(Arena *arena, CTRL_Entity *entity, B32 include_e
       }
     }
     di_scope_close(di_scope);
-    ctrl_scope_close(ctrl_scope);
+    access_close(access);
   }
   
   //- rjf: modules get debug info status extras
diff --git a/src/text/text.c b/src/text/text.c
index caa42dad..ef19c3a3 100644
--- a/src/text/text.c
+++ b/src/text/text.c
@@ -2254,7 +2254,7 @@ txt_text_info_from_hash_lang(Access *access, U128 hash, TXT_LangKind lang)
     TXT_LangKind lang;
   } key = {hash, lang};
   String8 key_string = str8_struct(&key);
-  AC_Artifact artifact = ac_artifact_from_key(access, key_string, txt_artifact_create, txt_artifact_destroy, 0);
+  AC_Artifact artifact = ac_artifact_from_key(access, key_string, txt_artifact_create, txt_artifact_destroy, 0, .flags = AC_Flag_Wide);
   TXT_Artifact *txt_artifact = (TXT_Artifact *)artifact.u64[0];
   TXT_TextInfo info = {0};
   if(txt_artifact != 0)