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gh-93382: Cache result of PyCode_GetCode in codeobject (GH-93383)

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Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Co-authored-by: Dennis Sweeney <36520290+sweeneyde@users.noreply.github.com>
This commit is contained in:
Ken Jin 2022-06-04 00:41:18 +08:00 committed by GitHub
parent d8f40ead92
commit d52ffc1d1f
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 21 additions and 4 deletions
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1
Include/cpython/code.h
View file

@ -88,6 +88,7 @@ typedef uint16_t _Py_CODEUNIT;
PyObject *co_qualname; /* unicode (qualname, for reference) */ \
PyObject *co_linetable; /* bytes object that holds location info */ \
PyObject *co_weakreflist; /* to support weakrefs to code objects */ \
void *_co_code; /* cached co_code object/attribute */ \
/* Scratch space for extra data relating to the code object. \
Type is a void* to keep the format private in codeobject.c to force \
people to go through the proper APIs. */ \

1
Misc/NEWS.d/next/Core and Builtins/2022-05-31-16-36-30.gh-issue-93382.Jf6gAj.rst Normal file
View file

@ -0,0 +1 @@
Speed up the :c:func:`PyCode_GetCode` function which also improves accessing the :attr:`~types.CodeType.co_code` attribute in Python.

7
Objects/codeobject.c
View file

@ -334,6 +334,7 @@ init_code(PyCodeObject *co, struct _PyCodeConstructor *con)
/* not set */
co->co_weakreflist = NULL;
co->co_extra = NULL;
co->_co_code = NULL;
co->co_warmup = QUICKENING_INITIAL_WARMUP_VALUE;
memcpy(_PyCode_CODE(co), PyBytes_AS_STRING(con->code),
@ -1367,12 +1368,17 @@ deopt_code(_Py_CODEUNIT *instructions, Py_ssize_t len)
PyObject *
_PyCode_GetCode(PyCodeObject *co)
{
if (co->_co_code != NULL) {
return Py_NewRef(co->_co_code);
}
PyObject *code = PyBytes_FromStringAndSize((const char *)_PyCode_CODE(co),
_PyCode_NBYTES(co));
if (code == NULL) {
return NULL;
}
deopt_code((_Py_CODEUNIT *)PyBytes_AS_STRING(code), Py_SIZE(co));
assert(co->_co_code == NULL);
co->_co_code = (void *)Py_NewRef(code);
return code;
}
@ -1531,6 +1537,7 @@ code_dealloc(PyCodeObject *co)
Py_XDECREF(co->co_qualname);
Py_XDECREF(co->co_linetable);
Py_XDECREF(co->co_exceptiontable);
Py_XDECREF(co->_co_code);
if (co->co_weakreflist != NULL) {
PyObject_ClearWeakRefs((PyObject*)co);
}

8
Objects/frameobject.c
View file

@ -458,22 +458,30 @@ _PyFrame_GetState(PyFrameObject *frame)
static void
add_load_fast_null_checks(PyCodeObject *co)
{
int changed = 0;
_Py_CODEUNIT *instructions = _PyCode_CODE(co);
for (Py_ssize_t i = 0; i < Py_SIZE(co); i++) {
switch (_Py_OPCODE(instructions[i])) {
case LOAD_FAST:
case LOAD_FAST__LOAD_FAST:
case LOAD_FAST__LOAD_CONST:
changed = 1;
_Py_SET_OPCODE(instructions[i], LOAD_FAST_CHECK);
break;
case LOAD_CONST__LOAD_FAST:
changed = 1;
_Py_SET_OPCODE(instructions[i], LOAD_CONST);
break;
case STORE_FAST__LOAD_FAST:
changed = 1;
_Py_SET_OPCODE(instructions[i], STORE_FAST);
break;
}
}
if (changed) {
// invalidate cached co_code object
Py_CLEAR(co->_co_code);
}
}
/* Setter for f_lineno - you can set f_lineno from within a trace function in

8
Programs/test_frozenmain.h generated
View file

@ -1,7 +1,7 @@
// Auto-generated by Programs/freeze_test_frozenmain.py
unsigned char M_test_frozenmain[] = {
227,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,
0,0,0,0,0,115,160,0,0,0,151,0,100,0,100,1,
0,0,0,0,0,243,160,0,0,0,151,0,100,0,100,1,
108,0,90,0,100,0,100,1,108,1,90,1,2,0,101,2,
100,2,171,1,0,0,0,0,0,0,0,0,1,0,2,0,
101,2,100,3,101,0,106,3,0,0,0,0,0,0,0,0,
@ -23,10 +23,10 @@ unsigned char M_test_frozenmain[] = {
32,122,2,58,32,41,7,218,3,115,121,115,218,17,95,116,
101,115,116,105,110,116,101,114,110,97,108,99,97,112,105,218,
5,112,114,105,110,116,218,4,97,114,103,118,218,11,103,101,
116,95,99,111,110,102,105,103,115,114,2,0,0,0,218,3,
116,95,99,111,110,102,105,103,115,114,3,0,0,0,218,3,
107,101,121,169,0,243,0,0,0,0,250,18,116,101,115,116,
95,102,114,111,122,101,110,109,97,105,110,46,112,121,250,8,
60,109,111,100,117,108,101,62,114,17,0,0,0,1,0,0,
60,109,111,100,117,108,101,62,114,18,0,0,0,1,0,0,
0,115,140,0,0,0,248,240,6,0,1,11,128,10,128,10,
128,10,216,0,24,208,0,24,208,0,24,208,0,24,224,0,
5,128,5,208,6,26,212,0,27,208,0,27,216,0,5,128,
@ -36,5 +36,5 @@ unsigned char M_test_frozenmain[] = {
67,240,14,0,5,10,128,69,208,10,40,144,67,208,10,40,
208,10,40,152,54,160,35,156,59,208,10,40,208,10,40,212,
4,41,208,4,41,208,4,41,240,15,7,1,42,240,0,7,
1,42,114,15,0,0,0,
1,42,114,16,0,0,0,
};