diff options
Diffstat (limited to 'Python/ceval.c')
| -rw-r--r-- | Python/ceval.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Python/ceval.c b/Python/ceval.c index c0e0993..b42444d 100644 --- a/Python/ceval.c +++ b/Python/ceval.c @@ -2011,7 +2011,18 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) PREDICTED_WITH_ARG(JUMP_ABSOLUTE); case JUMP_ABSOLUTE: JUMPTO(oparg); +#if FAST_LOOPS + /* Enabling this path speeds-up all while and for-loops by bypassing + the per-loop checks for signals. By default, this should be turned-off + because it prevents detection of a control-break in tight loops like + "while 1: pass". Compile with this option turned-on when you need + the speed-up and do not need break checking inside tight loops (ones + that contain only instructions ending with goto fast_next_opcode). + */ + goto fast_next_opcode; +#else continue; +#endif case GET_ITER: /* before: [obj]; after [getiter(obj)] */ |