Python: Speed up taint-tracking #1169
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…step for dicts and sequences.
taus-semmle
approved these changes
Mar 26, 2019
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Avoid computing many redundant copies of flow-step for dicts and sequences.
For example, the path-injection query has 114 different
SequenceKindorDictKind. Most of these are unused, so we don't want to compute flow-steps for them.Reduces the size of
TaintKind.getTaintForFlowStep(...), which could exceed 1Gb, to about 2% of its original size.