[Webkit-unassigned] [Bug 180537] New: YARR: Coalesce constructed character classes
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Dec 7 11:34:40 PST 2017
https://bugs.webkit.org/show_bug.cgi?id=180537
Bug ID: 180537
Summary: YARR: Coalesce constructed character classes
Product: WebKit
Version: Other
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: msaboff at apple.com
Currently when we construct a character class like [abcde], we end up with a check for each character instead of characters in the range of a..e. It is also common for RegExp's to be written with something like [\s\S] when the programmer really wanted a . with the newly added 's', aka dotAll flag. In that case we perform lots of individual character and range checks.
Instead we should coalesce characters and ranges when constructing a character class to reduce the resulting checks.
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