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SF patch #910929: Optimize list comprehensions

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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
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9
Python/ceval.c
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@ -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();