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Author A. Skrobov
Recipients A. Skrobov, christian.heimes, eryksun, paul.moore, rhettinger, serhiy.storchaka, steve.dower, tim.golden, vstinner, zach.ware
Date 2016-03-09.14:07:00
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Marked as misclassified Yes
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The attached patch for the parser reduces "Maximum resident set size (kbytes)" threefold, for the degenerate example of 'import ast; ast.parse("0,"*1000000, mode="eval")', by eliminating many CST nodes that have a single child.

According to the comment in node.c -- "89% of PyObject_REALLOC calls in PyNode_AddChild passed 1 for the size" -- the memory saving should be generally applicable, and not limited just to this degenerate case.

Modules/parsermodule.c is not yet updated to match. Please tell if you want me to do that, in case that my proposed change to the parser is acceptable.
Date User Action Args
2016-03-09 14:07:03A. Skrobovsetrecipients: + A. Skrobov, rhettinger, paul.moore, vstinner, christian.heimes, tim.golden, zach.ware, serhiy.storchaka, eryksun, steve.dower
2016-03-09 14:07:03A. Skrobovsetmessageid: <>
2016-03-09 14:07:03A. Skrobovlinkissue26415 messages
2016-03-09 14:07:03A. Skrobovcreate