miniblog.

← Back to all posts
Oct 7, 2026 at 09:59
1
I've now worked on several systems where the JSON was so big that avoiding pretty-printing was a performance win!

Related Posts

Sep 18, 2026 at 23:00
3
Difftastic 0.71 is out! This is a polish release, still well worth upgrading: * A ton of performance improvements, especially for nasty corner cases. * Improved C++, Dockerfile, Haskell, JavaScript, Makefile, Perl, Ruby, Rust, Scala and TypeScript.
Release 0.71.0 · Wilfred/difftastic
Release 0.71.0 · Wilfred/difftastic
Difftastic is a structural diff tool that understands syntax. See the manual to get started, and the changelog for historical changes. Diffing Improved performance, particularly for line-based diff...
Sep 11, 2026 at 22:08
3
I've been experimenting with LLM autoresearch. I prompted Sol to make difftastic faster without changing output on the test suite, and log everything it tried: https://github.com/Wilfred/difftastic/blob/c6e9c6fed4c71276a8b0e377c92695c3d929dc7f/PERF_RESEARCH_LOG.md It found some interesting performance tweaks, although it's too tolerant of complexity.
difftastic/PERF_RESEARCH_LOG.md at c6e9c6fed4c71276a8b0e377c92695c3d929dc7f · Wilfred/difftastic
difftastic/PERF_RESEARCH_LOG.md at c6e9c6fed4c71276a8b0e377c92695c3d929dc7f · Wilfred/difftastic
a structural diff that understands syntax 🟥🟩. Contribute to Wilfred/difftastic development by creating an account on GitHub.
Aug 7, 2026 at 22:20
171
I've released difftastic 0.70! In this release: * Added Dockerfile and fish shell support * Improved Dart, Emacs Lisp, Erlang, Java, OCaml, PHP, Protocol Buffers and TOML. * A bunch of display and performance fixes.
Release 0.70.0 · Wilfred/difftastic
Release 0.70.0 · Wilfred/difftastic
Difftastic is a structural diff tool that understands syntax. See the manual to get started, and the changelog for historical changes. Diffing Improved diffing performance, particularly when diffin...