SebastianBergmann\CodeCoverage\StaticAnalysis\CoveredFileAnalyser::ignoredLinesFor() is called once for each test so it makes sense to not only cache its result on disk but also in memory.
SebastianBergmann\CodeCoverage\StaticAnalysis\CoveredFileAnalyser::ignoredLinesFor()
is called once for each test so it makes sense to not only cache its
result on disk but also in memory.

The other methods of SebastianBergmann\CodeCoverage\StaticAnalysis\CoveredFileAnalyser
are called once per run so there is no point in also caching them in
memory.

sebastianbergmann/php-code-coverage,sebastianbergmann/php-code-coverage,sebastianbergmann/php-code-coverage