util._matcher: speed up regexp matching. In 4babaa52badf, Benoit made a change that substantially slows matching when a big .hgignore file is in play, because it calls into the regexp matching engine potentially hundreds of times per file to be matched. I've partly rolled back his change, so that we only call into the matcher once per file, but preserved the ability to report a meaningful error message if there's a syntax error in the regexp.

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changeset:   0:0acdaf898367

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tag:         tip

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user:        test

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date:        Mon Jan 12 13:46:40 1970 +0000

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summary:     test

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b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 644 a

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a

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checking changesets

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checking manifests

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crosschecking files in changesets and manifests

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checking files

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1 files, 1 changesets, 1 total revisions