mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 00:48:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

GH-93516: Speedup line number checks when tracing. (GH-93763)

Browse source 
* Use a lookup table to reduce overhead of getting line numbers during tracing.
This commit is contained in:
Mark Shannon 2022-06-20 13:00:42 +01:00 • committed by GitHub
parent 45e62a2bc1
commit ab0e601016
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
6 changed files with 101 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

29
Include/internal/pycore_code.h
View file

@ -461,6 +461,35 @@ adaptive_counter_backoff(uint16_t counter) {
}
/* Line array cache for tracing */
extern int _PyCode_CreateLineArray(PyCodeObject *co);
static inline int
_PyCode_InitLineArray(PyCodeObject *co)
{
if (co->_co_linearray) {
return 0;
}
return _PyCode_CreateLineArray(co);
}
static inline int
_PyCode_LineNumberFromArray(PyCodeObject *co, int index)
{
assert(co->_co_linearray != NULL);
assert(index >= 0);
assert(index < Py_SIZE(co));
if (co->_co_linearray_entry_size == 2) {
return ((int16_t *)co->_co_linearray)[index];
}
else {
assert(co->_co_linearray_entry_size == 4);
return ((int32_t *)co->_co_linearray)[index];
}
}
#ifdef __cplusplus
}
#endif