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improve tracing performance when f_trace is NULL (closes #16672)

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Patch by Xavier de Gaye.
This commit is contained in:
Benjamin Peterson 2012-12-24 11:53:30 -06:00
parent 6a7a49c631
commit 6f0c94df50
2 changed files with 6 additions and 3 deletions
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2
Misc/NEWS
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@ -10,6 +10,8 @@ What's New in Python 3.4.0 Alpha 1?
Core and Builtins Core and Builtins
----------------- -----------------
- Issue #16672: Improve performance tracing performance
- Issue #14470: Remove w9xpopen support per PEP 11. - Issue #14470: Remove w9xpopen support per PEP 11.
- Issue #9856: Replace deprecation warning with raising TypeError - Issue #9856: Replace deprecation warning with raising TypeError

7
Python/ceval.c
View file

@ -1277,7 +1277,8 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
/* line-by-line tracing support */ /* line-by-line tracing support */
if (_Py_TracingPossible && if (_Py_TracingPossible &&
tstate->c_tracefunc != NULL && !tstate->tracing) { tstate->c_tracefunc != NULL && !tstate->tracing &&
f->f_trace != NULL) {
int err; int err;
/* see maybe_call_line_trace /* see maybe_call_line_trace
for expository comments */ for expository comments */
@ -3008,7 +3009,7 @@ error:
/* Log traceback info. */ /* Log traceback info. */
PyTraceBack_Here(f); PyTraceBack_Here(f);
if (tstate->c_tracefunc != NULL) if (tstate->c_tracefunc != NULL && f->f_trace != NULL)
call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj, f); call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj, f);
fast_block_end: fast_block_end:
@ -3127,7 +3128,7 @@ fast_yield:
} }
if (tstate->use_tracing) { if (tstate->use_tracing) {
if (tstate->c_tracefunc) { if (tstate->c_tracefunc && f->f_trace != NULL) {
if (why == WHY_RETURN || why == WHY_YIELD) { if (why == WHY_RETURN || why == WHY_YIELD) {
if (call_trace(tstate->c_tracefunc, if (call_trace(tstate->c_tracefunc,
tstate->c_traceobj, f, tstate->c_traceobj, f,