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Title: gh-143995: Eliminate redundant refcounting in the JIT from LOAD_ATTR_MODULE by aisk · Pull Request #143996 · python/cpython · GitHub

Open Graph Title: gh-143995: Eliminate redundant refcounting in the JIT from LOAD_ATTR_MODULE by aisk · Pull Request #143996 · python/cpython

X Title: gh-143995: Eliminate redundant refcounting in the JIT from LOAD_ATTR_MODULE by aisk · Pull Request #143996 · python/cpython

Description: Generated `uops` before: _START_EXECUTOR _MAKE_WARM _SET_IP _CHECK_PERIODIC _CHECK_VALIDITY _ITER_CHECK_RANGE _GUARD_NOT_EXHAUSTED_RANGE _ITER_NEXT_RANGE _SET_IP _SWAP_FAST_3 _SPILL_OR_RELOAD _POP_TOP _CHECK_VALIDITY _LOAD_FAST_BORROW_1 _SET_IP _LOAD_ATTR_MODULE _CHECK_VALIDITY _SET_IP _SWAP_FAST_4 _POP_TOP _CHECK_VALIDITY _LOAD_FAST_BORROW_4 _SET_IP _TO_BOOL _CHECK_VALIDITY _GUARD_IS_TRUE_POP _LOAD_FAST_BORROW_2 _LOAD_CONST_INLINE_BORROW _GUARD_NOS_INT _BINARY_OP_ADD_INT _POP_TOP_NOP _POP_TOP_NOP _SWAP_FAST_2 _POP_TOP_INT _JUMP_TO_TOP _DEOPT _ERROR_POP_N _DEOPT _EXIT_TRACE _EXIT_TRACE _ERROR_POP_N _DEOPT _DEOPT _DEOPT _DEOPT _ERROR_POP_N _DEOPT _EXIT_TRACE _EXIT_TRACE Generated `uops` after: _START_EXECUTOR _MAKE_WARM _SET_IP _CHECK_PERIODIC _CHECK_VALIDITY _ITER_CHECK_RANGE _GUARD_NOT_EXHAUSTED_RANGE _ITER_NEXT_RANGE _SET_IP _SWAP_FAST_3 _SPILL_OR_RELOAD _POP_TOP _CHECK_VALIDITY _LOAD_FAST_BORROW_1 _LOAD_ATTR_MODULE _POP_TOP_NOP _SET_IP _SWAP_FAST_4 _POP_TOP _CHECK_VALIDITY _LOAD_FAST_BORROW_4 _SET_IP _TO_BOOL _CHECK_VALIDITY _GUARD_IS_TRUE_POP _LOAD_FAST_BORROW_2 _LOAD_CONST_INLINE_BORROW _GUARD_NOS_INT _BINARY_OP_ADD_INT _POP_TOP_NOP _POP_TOP_NOP _SWAP_FAST_2 _POP_TOP_INT _JUMP_TO_TOP _DEOPT _ERROR_POP_N _DEOPT _EXIT_TRACE _EXIT_TRACE _ERROR_POP_N _DEOPT _DEOPT _DEOPT _ERROR_POP_N _DEOPT _EXIT_TRACE _EXIT_TRACE Diff: _START_EXECUTOR _START_EXECUTOR _MAKE_WARM _MAKE_WARM _SET_IP _SET_IP _CHECK_PERIODIC _CHECK_PERIODIC _CHECK_VALIDITY _CHECK_VALIDITY _ITER_CHECK_RANGE _ITER_CHECK_RANGE _GUARD_NOT_EXHAUSTED_RANGE _GUARD_NOT_EXHAUSTED_RANGE _ITER_NEXT_RANGE _ITER_NEXT_RANGE _SET_IP _SET_IP _SWAP_FAST_3 _SWAP_FAST_3 _SPILL_OR_RELOAD _SPILL_OR_RELOAD _POP_TOP _POP_TOP _CHECK_VALIDITY _CHECK_VALIDITY _LOAD_FAST_BORROW_1 _LOAD_FAST_BORROW_1 _SET_IP < _LOAD_ATTR_MODULE _LOAD_ATTR_MODULE _CHECK_VALIDITY | _POP_TOP_NOP _SET_IP _SET_IP _SWAP_FAST_4 _SWAP_FAST_4 _POP_TOP _POP_TOP _CHECK_VALIDITY _CHECK_VALIDITY _LOAD_FAST_BORROW_4 _LOAD_FAST_BORROW_4 _SET_IP _SET_IP _TO_BOOL _TO_BOOL _CHECK_VALIDITY _CHECK_VALIDITY _GUARD_IS_TRUE_POP _GUARD_IS_TRUE_POP _LOAD_FAST_BORROW_2 _LOAD_FAST_BORROW_2 _LOAD_CONST_INLINE_BORROW _LOAD_CONST_INLINE_BORROW _GUARD_NOS_INT _GUARD_NOS_INT _BINARY_OP_ADD_INT _BINARY_OP_ADD_INT _POP_TOP_NOP _POP_TOP_NOP _POP_TOP_NOP _POP_TOP_NOP _SWAP_FAST_2 _SWAP_FAST_2 _POP_TOP_INT _POP_TOP_INT _JUMP_TO_TOP _JUMP_TO_TOP _DEOPT _DEOPT _ERROR_POP_N _ERROR_POP_N _DEOPT _DEOPT _EXIT_TRACE _EXIT_TRACE _EXIT_TRACE _EXIT_TRACE _ERROR_POP_N _ERROR_POP_N _DEOPT < _DEOPT _DEOPT _DEOPT _DEOPT _DEOPT _DEOPT _ERROR_POP_N _ERROR_POP_N _DEOPT _DEOPT _EXIT_TRACE _EXIT_TRACE _EXIT_TRACE _EXIT_TRACE The time cost for 1000000 iterations in the testfunc in the test case is reduced from approximately 126 seconds to 120 seconds. Issue: gh-143995

Open Graph Description: Generated `uops` before: _START_EXECUTOR _MAKE_WARM _SET_IP _CHECK_PERIODIC _CHECK_VALIDITY _ITER_CHECK_RANGE _GUARD_NOT_EXHAUSTED_RANGE _ITER_NEXT_RANGE _SET_IP _SWAP_FAST_3 _SPILL_OR_RELOAD _PO...

X Description: Generated `uops` before: _START_EXECUTOR _MAKE_WARM _SET_IP _CHECK_PERIODIC _CHECK_VALIDITY _ITER_CHECK_RANGE _GUARD_NOT_EXHAUSTED_RANGE _ITER_NEXT_RANGE _SET_IP _SWAP_FAST_3 _SPILL_OR_RELOAD _PO...

Opengraph URL: https://github.com/python/cpython/pull/143996

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gh-143995: Eliminate redundant refcounting in the JIT from LOAD_ATTR_MODULE https://patch-diff.githubusercontent.com/python/cpython/pull/143996/files#top
Show all changes 6 commits https://patch-diff.githubusercontent.com/python/cpython/pull/143996/files
a95d364 Eliminate redundant refcounting for LOAD_ATTR_MODULE aisk Jan 14, 2026 https://patch-diff.githubusercontent.com/python/cpython/pull/143996/commits/a95d364b9794aab957aad440f61e7267d50d3621
c0ad56c Update genrated files aisk Jan 17, 2026 https://patch-diff.githubusercontent.com/python/cpython/pull/143996/commits/c0ad56c6e54b7a33b80acbf30a2dfbb40f807499
b803214 add test aisk Jan 17, 2026 https://patch-diff.githubusercontent.com/python/cpython/pull/143996/commits/b8032149c63b5823c46dee76ca4e12f6ece4ca52
3d30896 Update test aisk Jan 18, 2026 https://patch-diff.githubusercontent.com/python/cpython/pull/143996/commits/3d30896fa2e03d01e99811f3c1f865da1848e374
4b238bc Fix tests aisk Jan 18, 2026 https://patch-diff.githubusercontent.com/python/cpython/pull/143996/commits/4b238bcd4dc97b07a9cdc3c5a4b526f4fb41450e
267f9c0 Blurb this aisk Jan 18, 2026 https://patch-diff.githubusercontent.com/python/cpython/pull/143996/commits/267f9c004fc22b63dd0f1f0e63be14e4a6f43ca2
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