diff --git a/src/radbin/radbin.c b/src/radbin/radbin.c
index fd3220dc..5424e039 100644
--- a/src/radbin/radbin.c
+++ b/src/radbin/radbin.c
@@ -775,7 +775,7 @@ rb_thread_entry_point(void *p)
       
       //- rjf: bake
       RDIM_BakeResults bake_results = {0};
-      if(convert_done) ProfScope("bake")
+      ProfScope("bake")
       {
         bake_results = rdim_bake(arena, bake_params);
       }
@@ -789,14 +789,19 @@ rb_thread_entry_point(void *p)
         case OutputKind_RDI:
         {
           // rjf: serialize
-          RDIM_SerializedSectionBundle serialized_section_bundle = {0};
-          ProfScope("serialize") serialized_section_bundle = rdim_serialized_section_bundle_from_bake_results(&bake_results);
+          RDIM_SerializedSectionBundle *serialized_section_bundle = 0;
+          ProfScope("serialize") if(lane_idx() == 0)
+          {
+            serialized_section_bundle = push_array(arena, RDIM_SerializedSectionBundle, 1);
+            serialized_section_bundle[0] = rdim_serialized_section_bundle_from_bake_results(&bake_results);
+          }
+          lane_sync_u64(&serialized_section_bundle, 0);
           
           // rjf: compress
-          RDIM_SerializedSectionBundle serialized_section_bundle__compressed = serialized_section_bundle;
+          RDIM_SerializedSectionBundle serialized_section_bundle__compressed = serialized_section_bundle[0];
           if(cmd_line_has_flag(cmdline, str8_lit("compress"))) ProfScope("compress")
           {
-            serialized_section_bundle__compressed = rdim_compress(arena, &serialized_section_bundle);
+            serialized_section_bundle__compressed = rdim_compress(arena, serialized_section_bundle);
           }
           
           // rjf: serialize
diff --git a/src/rdi_make/rdi_make_local.c b/src/rdi_make/rdi_make_local.c
index d6678622..90eebbcc 100644
--- a/src/rdi_make/rdi_make_local.c
+++ b/src/rdi_make/rdi_make_local.c
@@ -2969,18 +2969,23 @@ rdim_bake(Arena *arena, RDIM_BakeParams *params)
 internal RDIM_SerializedSectionBundle
 rdim_compress(Arena *arena, RDIM_SerializedSectionBundle *in)
 {
-  RDIM_SerializedSectionBundle out = {0};
+  Temp scratch = scratch_begin(&arena, 1);
+  RDIM_SerializedSectionBundle out_ = {0};
+  RDIM_SerializedSectionBundle *out = &out_;
+  lane_sync_u64(&out, 0);
   
   //- rjf: set up compression context
   rr_lzb_simple_context ctx = {0};
   ctx.m_tableSizeBits = 14;
-  ctx.m_hashTable = push_array(arena, U16, 1<<ctx.m_tableSizeBits);
+  ctx.m_hashTable = push_array(scratch.arena, U16, 1<<ctx.m_tableSizeBits);
   
   //- rjf: compress, or just copy, all sections
-  for EachEnumVal(RDI_SectionKind, k)
+  Rng1U64 range = lane_range(RDI_SectionKind_COUNT);
+  for EachInRange(idx, range)
   {
+    RDI_SectionKind k = (RDI_SectionKind)idx;
     RDIM_SerializedSection *src = &in->sections[k];
-    RDIM_SerializedSection *dst = &out.sections[k];
+    RDIM_SerializedSection *dst = &out->sections[k];
     MemoryCopyStruct(dst, src);
     if(src->encoded_size != 0)
     {
@@ -2991,6 +2996,8 @@ rdim_compress(Arena *arena, RDIM_SerializedSectionBundle *in)
       dst->encoding = RDI_SectionEncoding_LZB;
     }
   }
+  lane_sync();
   
-  return out;
+  scratch_end(scratch);
+  return *out;
 }