If I understand this correctly:
- the first time we execute a regexp on an input, we set saveAnswer to false
(cache miss)
- the second time we execute a regexp on the same input (first cache hit),
we
set saveAnswer to true and saves and clones the result.
- any subsequent time we execute the regexp on the same input (further cache
hits), we return a clone of the result.
This avoids a cloning of the result of regexps that are only executed once.
If this is correct, LGTM.
http://codereview.chromium.org/1556019/show
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