A major performance degradation was observed in https://github.com/bazelbuild/rules_nodejs (specifically internal/coverage/lcov_merger.ts) when there are a large number of files instrumented for coverage. This is due to prepGlobPatterns spending a great deal of time copying an ever-growing array, leading to an exponential slowdown (each copy takes longer than the last).
To fix this a single mutable array is now created in prepGlobPatterns. This should improve performance for most use cases, but is significant when include and/or exclude arrays are large.
Also upgraded tap (which was not working locally for me prior to upgrading).
A major performance degradation was observed in https://github.com/bazelbuild/rules_nodejs (specifically internal/coverage/lcov_merger.ts) when there are a large number of files instrumented for coverage. This is due to
prepGlobPatternsspending a great deal of time copying an ever-growing array, leading to an exponential slowdown (each copy takes longer than the last).To fix this a single mutable array is now created in
prepGlobPatterns. This should improve performance for most use cases, but is significant whenincludeand/orexcludearrays are large.Also upgraded
tap(which was not working locally for me prior to upgrading).