chrg6 87f51f94a9 Read shaders from the disk cache off the render thread past a small budget, and pack the cache on carried updates. ...

A profiled traversal session had 9 of its 16 worst hitches (100 to 500 ms) inside the render thread's shader lookup,
reading <key>.res.json and <key>.spv of shaders met for the first time: opening a loose file costs about 3 ms the first
time on Windows. get_async_one now reads in place while those reads stay within 1/8 of the wall time (2 ms at once);
past that three loader threads read them and the draws wait as for a translation. The perf line counts both.

The launcher's updates carry the shaders over and never packed the cache, which held 44,000 loose translations in the
test install. An update now packs it once it holds 1,000 loose ones, and the pack tool reads the loose files on 16
threads.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-11-09 14:34:45 -05:00

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