refactor(@angular/build): optimize removeSourceMappingURL with pre-check and range slicing - #33780
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alan-agius4 merged 1 commit intoAug 6, 2026
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…eck and range slicing Add an early substring check to immediately return the original code when no source map comment is present in a file. In addition, replace the character-by-character string accumulator with range slicing to eliminate temporary single-character string allocations on large files, and add unit tests covering zero-comment early returns and CRLF line endings.
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This pull request optimizes the removeSourceMappingURL function by introducing a fast-path check when no sourcemap comment is present and refactoring the character-by-character reconstruction to use string slicing with a lastCopiedIndex tracker. Additionally, new unit tests are added to verify the behavior with CRLF newlines and inputs without sourcemap comments. There are no review comments, and we have no feedback to provide.
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Add an early substring check to immediately return the original code when no source map comment is present in a file. In addition, replace the character-by-character string accumulator with range slicing to eliminate temporary single-character string allocations on large files, and add unit tests covering zero-comment early returns and CRLF line endings.