Improve performance of sourceFilesAndDirectories
#1865
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hamishknight
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`SourceFilesAndDirectoriesKey` contained all source files in the project and computing its hash value was pretty expensive. The key didn’t really provide any value here because the only way it changes is if the build targets change and if that’s the case, we already clear `cachedSourceFilesAndDirectories`, so we can just avoid the hash value computation.
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SourceFilesAndDirectoriesKeycontained all source files in the project and computing its hash value was pretty expensive. The key didn’t really provide any value here because the only way it changes is if the build targets change and if that’s the case, we already clearcachedSourceFilesAndDirectories, so we can just avoid the hash value computation.