Sourced from diff's changelog.

v5.2.0

Commits

• #411 Big performance improvement. Previously an O(n) array-copying operation inside the innermost loop of jsdiff's base diffing code increased the overall worst-case time complexity of computing a diff from O(n²) to O(n³). This is now fixed, bringing the worst-case time complexity down to what it theoretically should be for a Myers diff implementation.
• #448 Performance improvement. Diagonals whose furthest-reaching D-path would go off the edge of the edit graph are now skipped, rather than being pointlessly considered as called for by the original Myers diff algorithm. This dramatically speeds up computing diffs where the new text just appends or truncates content at the end of the old text.
• #351 Importing from the lib folder - e.g. require("diff/lib/diff/word.js") - will work again now. This had been broken for users on the latest version of Node since Node 17.5.0, which changed how Node interprets the exports property in jsdiff's package.json file.
• #344 diffLines, createTwoFilesPatch, and other patch-creation methods now take an optional stripTrailingCr: true option which causes Windows-style \r\n line endings to be replaced with Unix-style \n line endings before calculating the diff, just like GNU diff's --strip-trailing-cr flag.
• #451 Added diff.formatPatch.
• #450 Added diff.reversePatch.
• #478 Added timeout option.

v5.1.0

• #365 Allow early termination to limit execution time with degenerate cases

Commits

v5.0.0

• Breaking: UMD export renamed from JsDiff to Diff.
• Breaking: Newlines separated into separate tokens for word diff.
• Breaking: Unified diffs now match "quirks"

Commits

v4.0.1 - January 6th, 2019

• Fix main reference path - b826104

Commits

v4.0.0 - January 5th, 2019

• #94 - Missing "No newline at end of file" when comparing two texts that do not end in newlines (@​federicotdn)
• #227 - Licence
• #199 - Import statement for jsdiff
• #159 - applyPatch affecting wrong line number with with new lines
• #8 - A new state "replace"
• Drop ie9 from karma targets - 79c31bd
• Upgrade deps. Convert from webpack to rollup - 2c1a29c
• Make ()[]"' as word boundaries between each other - f27b899
• jsdiff: Replaced phantomJS by chrome - ec3114e
• Add yarn.lock to .npmignore - 29466d8

Compatibility notes:

• Bower and Component packages no longer supported

Commits

... (truncated)

• 370a9df 5.2.0 release (#483)
• a2f726a Add myself to the list of maintainers (#482)
• dfc6fe4 Add examples to docs of creating and applying patches (importantly including ...
• b5d1cfa Modify node_example.js to support showing added/deleted spaces (#479)
• 533893d Add timeout option (#478)
• 1f1ec96 Replace broken link to Myers's paper in the README with a working one (#476)
• 707fccc Add note to README about setting context to Infinity or MAX_SAFE_INTEGER. (...
• 1c7514c Fix mistake in README (#471)
• ca8718c Bump follow-redirects from 1.14.8 to 1.15.4 (#470)
• 25a14af Migrate to DABH's fork of colors (#469)
• Additional commits viewable in compare view

This version was pushed to npm by explodingcabbage, a new releaser for diff since your current version.

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