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a9335928c7
8-post thread on NV-specific 1-deep swap with IMMEDIATE presentation,
after previous AMD-tuned impl stopped working. One descriptor set
always bound (resources static after init). Dropped
VK_DESCRIPTOR_SET_LAYOUT_CREATE_UPDATE_AFTER_BIND_POOL_BIT_EXT
('god awful naming length') to avoid NV indirection perf hit.
2700 lines of engine, embedded headers, one-file compile. 0.25 sec
hot-load on NV dGPU: 4 MiB 'cart' file from pagecache, 512 MiB GPU
buffer, all PSOs, image alloc, command buffer copy+clear. Load-time
parallelism: {instance create, cart map, TLB warming by walking pages,
window bringup} = 0.08 sec. After VK device, signal background SPIR-V
load while building descriptor set layout, then PSO compile
parallel. Earliest documented use of 'cart file' term - 9 months
before the Aug 2025 public announcement.