Microoptimise read buffering, metastore abspath, path joining#20810
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hauntsaninja merged 1 commit intopython:masterfrom Feb 15, 2026
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Microoptimise read buffering, metastore abspath, path joining#20810hauntsaninja merged 1 commit intopython:masterfrom
hauntsaninja merged 1 commit intopython:masterfrom
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Removing buffering on file reads can make those reads like 20% faster. This is probably worth a few percent on a warm cache profile I was looking at. Removing abspath in metastore also looks like a percent or two on a warm cache profile. I don't think using the faster path join from python#17949 will really help the profiles I was looking at, but if we're microoptimising some of these code paths we might as well. (On a cold profile I do think some of the variadic os.path.join now add up enough that it could be worth making a function for them, but whatever)
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
ilevkivskyi
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Feb 14, 2026
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Removing buffering on file reads can make those reads like 20% faster. This is probably worth a few percent on a warm cache profile I was looking at.
Removing abspath in metastore also looks like a percent or two on a warm cache profile.
I don't think using the faster path join from #17949 will really help the profiles I was looking at, but if we're microoptimising some of these code paths we might as well. (On a cold profile I do think some of the variadic os.path.join now add up enough that it could be worth making a function for them, but whatever)