Build-engineering notes from the rninja team: where ninja leaves perf on the table, drop-in caching that respects determinism, and honest profiling of build graphs.https://rninja.neullabs.com/en-ushttps://rninja.neullabs.com/blog/profiling-build-graphs-honestly/https://rninja.neullabs.com/blog/profiling-build-graphs-honestly/Most build profiling work is done with the wrong tool, the wrong granularity, or the wrong assumptions about what 'slow' means. Here is how to do it well.Tue, 02 Jun 2026 00:00:00 GMThttps://rninja.neullabs.com/blog/drop-in-caching-that-doesnt-break-determinism/https://rninja.neullabs.com/blog/drop-in-caching-that-doesnt-break-determinism/Caching can speed up a build or break it. The difference is what the cache hashes and what it remembers. Here is the design that lets rninja cache aggressively without changing the result.Tue, 26 May 2026 00:00:00 GMThttps://rninja.neullabs.com/blog/where-ninja-leaves-perf-on-the-table/https://rninja.neullabs.com/blog/where-ninja-leaves-perf-on-the-table/ninja is fast because it strips the executor down to its essentials. That same minimalism is also where the modern speedups live. Here is the map of the table.Tue, 12 May 2026 00:00:00 GMT