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| author | Dong-hee Na <donghee.na92@gmail.com> | 2020-10-21 01:29:14 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-10-21 01:29:14 (GMT) |
| commit | 25492a5b59c5b74328278f195540e318ab87674f (patch) | |
| tree | 4a78df2e9db249b2c35eb6d7c21a334f3d355228 /Objects | |
| parent | a460d45063844a21c20fa8b0d23878165f99f3b5 (diff) | |
| download | cpython-25492a5b59c5b74328278f195540e318ab87674f.zip cpython-25492a5b59c5b74328278f195540e318ab87674f.tar.gz cpython-25492a5b59c5b74328278f195540e318ab87674f.tar.bz2 | |
bpo-41902: Micro optimization for compute_item of range (GH-22492)
Diffstat (limited to 'Objects')
| -rw-r--r-- | Objects/rangeobject.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c index ba6d425..eaa48d5 100644 --- a/Objects/rangeobject.c +++ b/Objects/rangeobject.c @@ -254,11 +254,17 @@ compute_item(rangeobject *r, PyObject *i) /* PyLong equivalent to: * return r->start + (i * r->step) */ - incr = PyNumber_Multiply(i, r->step); - if (!incr) - return NULL; - result = PyNumber_Add(r->start, incr); - Py_DECREF(incr); + if (r->step == _PyLong_One) { + result = PyNumber_Add(r->start, i); + } + else { + incr = PyNumber_Multiply(i, r->step); + if (!incr) { + return NULL; + } + result = PyNumber_Add(r->start, incr); + Py_DECREF(incr); + } return result; } |