mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-21 14:12:27 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

SF patch #910929: Optimize list comprehensions

Browse source 
Add a new opcode, LIST_APPEND, and apply it to the code generation for
list comprehensions.  Reduces the per-loop overhead by about a third.
This commit is contained in:
Raymond Hettinger 2004-03-07 07:31:06 +00:00
parent bff63f0343
commit dd80f76265
6 changed files with 20 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

9
Python/ceval.c
View file

@ -1225,6 +1225,15 @@ eval_frame(PyFrameObject *f)
if (x != NULL) continue;
break;
case LIST_APPEND:
w = POP();
v = POP();
err = PyList_Append(v, w);
Py_DECREF(v);
Py_DECREF(w);
if (err == 0) continue;
break;
case INPLACE_POWER:
w = POP();
v = TOP();