Fix perf regression when checking for changed content #10234
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This allows us to track changes in files that are both a context and content dependency in a way that preserves file mod checking optimizations
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We will now track changes in files that are both a context and content dependency in a way that preserves file mod checking optimizations. Technically, we already handle this but the implementation resulted in a significant perf regression that shows up if you scan lots of files (for example: all of
node_modules).See #9787 (comment) for more details.