diff options
| author | Raymond Hettinger <rhettinger@users.noreply.github.com> | 2018-09-21 08:46:41 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-09-21 08:46:41 (GMT) |
| commit | b46ad5431d2643f61e929c1ffec48766b2fafd75 (patch) | |
| tree | d82d6b7498df61a8f86afdb38f5396c826b7c4a3 /Modules/_collectionsmodule.c | |
| parent | fb3e9c00ed79f4d880ab9a67aab861eb3660ec75 (diff) | |
| download | cpython-b46ad5431d2643f61e929c1ffec48766b2fafd75.zip cpython-b46ad5431d2643f61e929c1ffec48766b2fafd75.tar.gz cpython-b46ad5431d2643f61e929c1ffec48766b2fafd75.tar.bz2 | |
Minor performance tweak for deque.index() with a start argument (GH-9440)
Diffstat (limited to 'Modules/_collectionsmodule.c')
| -rw-r--r-- | Modules/_collectionsmodule.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c index 935b434..267cf07 100644 --- a/Modules/_collectionsmodule.c +++ b/Modules/_collectionsmodule.c @@ -1050,8 +1050,10 @@ deque_index(dequeobject *deque, PyObject *const *args, Py_ssize_t nargs) start = stop; assert(0 <= start && start <= stop && stop <= Py_SIZE(deque)); - /* XXX Replace this loop with faster code from deque_item() */ - for (i=0 ; i<start ; i++) { + for (i=0 ; i < start - BLOCKLEN ; i += BLOCKLEN) { + b = b->rightlink; + } + for ( ; i < start ; i++) { index++; if (index == BLOCKLEN) { b = b->rightlink; |