[Python-Dev] [ python-Patches-876206 ] scary frame speed hacks (original) (raw)

Greg Ewing greg at cosc.canterbury.ac.nz
Tue Mar 2 19:21:44 EST 2004

Raymond Hettinger <python at rcn.com>:

The patch eliminates the freelist in favor of keeping a single pre-made frame for each code block. In addition to saving a call to malloc(), the advantage is that the pre-made frame is custom to the code block and only half of fields need to be updated each time the code block is called.

How about keeping a list of pre-made frames for each code block? That would give you the best of both while still only having two initialisation cases.

Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | greg at cosc.canterbury.ac.nz +--------------------------------------+

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