[Perf] (MG_State/FastSTL): make object deletion cheap again

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- GLContext::MarkBufferObjectForDeletion now detaches the deleted buffer
  only from the currently bound VAO (GL 4.6 5.1.2 semantics; other VAOs
  keep their shared_ptr attachments alive). The old every-VAO scan was
  O(VAOs) per delete - with one VAO per chunk section, vanilla chunk
  churn made it dominate the render thread and FPS decay over minutes.
- Bump FastSTL: erase(key) destroys in place instead of building the
  discarded successor iterator (a linear bucket-array scan), and switch
  the buffer/framebuffer/renderbuffer deletion paths to the key overload.

Together these removed the 34% render-thread deletion overhead measured
in aged vanilla sessions (simpleperf, Adreno 830 / DirectVulkan).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

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This commit is contained in:

swung0x48

2026-07-09 12:12:50 +00:00

co-authored by Claude Fable 5

parent bb3a18c627

commit 08e808ef20

5 changed files with 15 additions and 8 deletions

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include/FastSTL

+1 -1

Submodule include/FastSTL updated: 644b3b01e6...34f55f9df2