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GeezerVison is showing github.com — [mypyc] Only check a sample of non-BMP code points in str tests by Jahongir-Qurbonov · Pull Request #22448 · python/mypy

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@Jahongir-Qurbonov

@Jahongir-Qurbonov Jahongir-Qurbonov commented Nov 12, 2026

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Follow-up to the review comment in #22407.

Tests for chr(), str.lower()/str.upper(), str.isspace(), str.isdigit() and the str.is* methods added in #22404 compared the result against the generic implementation for every code point (0 to 0x10FFFF), which is slow, especially through the generic code path.

Now these tests check all code points in the BMP, which covers the 1-byte and 2-byte string kinds, and every 97th code point above it, plus the largest code point. This is about 76K code points instead of 1.1M.

The same change is applied to the tests in #22405 and #22406.

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@Jahongir-Qurbonov
[mypyc] Only check a sample of non-BMP code points in str tests
589f7d9
Tests for chr() and several str methods compared the result against the
generic implementation for every code point, which is slow, especially
when using the generic implementation. Check all code points in the BMP,
which covers the 1-byte and 2-byte string kinds, and every 97th code
point above it (and the largest one).
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@Jahongir-Qurbonov
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