performance – Page 12 – Türker Yıldırım

The .dockerignore that halved the build context

NoteJanuary 10, 20232 min read

A 420 MB build context on a repository that is 60 MB, because .git, node_modules and four years of local uploads were all being sent to the daemon.…

Larger runners, and the pipeline that was memory-bound

Deep diveDecember 13, 202210 min read

October, larger runners, and a build that was swapping. A Node build that used 6 GB on a 7 GB runner.

__destruct runs at an unpredictable moment, and may not run

NoteDecember 10, 20222 min read

A destructor runs when the last reference is dropped, which is not the same as when the variable goes out of scope, and not at all on a…

OPTIMIZE TABLE is a rebuild wearing a friendly name

NoteDecember 8, 20222 min read

For InnoDB, OPTIMIZE TABLE is mapped to an ALTER TABLE … FORCE, which copies the whole table. The friendly name is the problem: it sounds like a maintenance…

innodb_flush_log_at_trx_commit is a durability decision

NoteDecember 4, 20222 min read

The default flushes and syncs the log on every commit, which is the only setting that survives an operating system crash without losing transactions. Setting this to 2…

Subsetting a font is the 80% nobody takes

NoteNovember 29, 20222 min read

A variable font covering every script is several hundred kilobytes, and a site rendering English and Turkish needs a fraction of it. Dropping layout features is where the…

Caching a Docker layer in Actions with type=gha

NoteNovember 25, 20221 min read

A fresh runner has an empty build cache, so every pipeline run rebuilds every layer unless the cache is exported somewhere the next run can reach. mode=max exports…

A design system in theme.json and a stylesheet that agrees

Deep diveNovember 17, 202210 min read

6.1, fluid typography, and a stylesheet that had its own scale. Two definitions of a spacing scale, one in each place.

A pipeline that only builds what changed

Deep diveNovember 15, 202210 min read

A 22-minute pipeline on a repository where most changes touch one directory. Every push runs everything, including the untouched.

A queue worker that scales on the metric that matters

Deep diveNovember 9, 202210 min read

Six workers, always, whether there is work or not. A backlog at 09:00 and idle capacity at 03:00.