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Always disable sync in SQLite cache#21184

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ilevkivskyi:always-sync-off
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Always disable sync in SQLite cache#21184
ilevkivskyi wants to merge 1 commit intopython:masterfrom
ilevkivskyi:always-sync-off

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@ilevkivskyi
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Fixes #21176

This seems to resolve all the HDD performance issues. Although this makes cache less durable, this is fine, as FS is not perfect in this sense either (and it doesn't really need to be that durable).

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github-actions bot commented Apr 7, 2026

According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅

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Very bad performance with SQLite cache (on a Linux machine with HDD)

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