[mypyc] Add experimental librt.time module with time()#20723
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
p-sawicki
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Feb 2, 2026
| extra_compile_args=cflags, | ||
| ), | ||
| Extension( | ||
| "librt.time", ["time/librt_time.c"], include_dirs=["."], extra_compile_args=cflags |
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add "time" to include_dirs?
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It seems fine to requite time/ prefix in includes.
| ["vecs/librt_vecs.h", "vecs/vec_template.c"], | ||
| ["vecs"], | ||
| ), | ||
| ModDesc("librt.time", ["time/librt_time.c"], ["time/librt_time.h"], []), |
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also would make sense to add the include dir here.
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Currently everything works without the include dir, so I'm leaning towards keeping it as is.
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I've seen many performance-critical functions that have calls to
time.time(), which is perhaps not that surprising. I don't want to just add a primitive fortime.time(), since it's often monkey patched, and primitive functions generally can't be monkey patched. Instead, I add thelibrt.timemodule here, which has an efficienttime()function that can be used in performance-critical code (but it can't be monkey patched).In a microbenchmark this was up to 70% faster than using
time.time().I used a lot of coding agent assist. I'm relying on CI to test the Windows implementation.