mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-11-13 07:26:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

Special case endpoint access for speed.

Browse source
This commit is contained in:
Raymond Hettinger 2004-03-04 08:00:54 +00:00
parent 30e97dbe96
commit 6c79a518e7
1 changed files with 18 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

28
Modules/collectionsmodule.c
View file

@ -326,18 +326,26 @@ deque_item(dequeobject *deque, int i)
return NULL; return NULL;
} }
i += deque->leftindex; if (i == 0) {
n = i / BLOCKLEN; i = deque->leftindex;
i %= BLOCKLEN;
if (i < (deque->len >> 1)) {
b = deque->leftblock; b = deque->leftblock;
while (n--) } else if (i == deque->len - 1) {
b = b->rightlink; i = deque->rightindex;
} else {
n = (deque->leftindex + deque->len - 1) / BLOCKLEN - n;
b = deque->rightblock; b = deque->rightblock;
while (n--) } else {
b = b->leftlink; i += deque->leftindex;
n = i / BLOCKLEN;
i %= BLOCKLEN;
if (i < (deque->len >> 1)) {
b = deque->leftblock;
while (n--)
b = b->rightlink;
} else {
n = (deque->leftindex + deque->len - 1) / BLOCKLEN - n;
b = deque->rightblock;
while (n--)
b = b->leftlink;
}
} }
item = b->data[i]; item = b->data[i];
Py_INCREF(item); Py_INCREF(item);