gh-100227: Isolate the Import State to Each Interpreter #101941
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ericsnowcurrently
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FYI, I ran the benchmarks on this and it reported a 1% speedup, which wasn't expected. :) |
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Specific changes:
PyInterpreterStatePyInterpreterStateNote that the import lock exists to keep multiple imports of the same module in the same interpreter (but in different threads) from stomping on each other. Independently, we use a distinct global lock to protect globally shared import state, especially related to loaded extension modules. For now we can rely on the GIL as that lock but with a per-interpreter GIL we'll need a new global lock.
The remaining state in
_PyRuntimeState.importswill continue being global.