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Octane keeps the application in memory and finds every static you left

Deep diveApril 21, 202110 min read

40ms becomes 8ms, and the fourth request returns another customer’s data. The shared-nothing assumption is load-bearing in more places than anybody had counted.

The cache that returned stale data for eleven days

Deep diveMarch 4, 202110 min read

A price change that took eleven days to reach one page. Three caches, and only one of them was being cleared.

An OpenAPI document that is the test suite’s source of truth

Deep diveFebruary 23, 202110 min read

3.1 lands in February with real JSON Schema. Generating docs from code fixes half the problem; making the document the contract fixes the other half.

The N+1 that only appeared in the API serialiser

Deep diveFebruary 14, 202110 min read

A controller with eager loading and four hundred queries anyway, because the query count depends on which fields the client asked for.

A queue worker that stops cleanly

Deep diveFebruary 11, 202110 min read

A deploy killed a worker mid-job and a customer was charged without an order. SIGTERM, a grace period that was too short, and the job that must be…

Asserting a query count with a loose bound

NoteJanuary 7, 20212 min read

A test asserting an exact query count fails on every unrelated change and is deleted within a month; a bound survives. The fixture size is the part that…

A repository returning a query builder is not a repository

NoteJanuary 5, 20212 min read

A repository is a collection-like interface over persisted objects, and returning a query builder makes every caller a co-author of the persistence layer. The builder version cannot be…

Named arguments and attributes change how a framework is written

Deep diveDecember 29, 202010 min read

Two 8.0 features that look like syntax and are not. One makes optional parameters part of the API; the other makes docblocks executable.

Read-after-write goes to the primary, always

NoteNovember 23, 20202 min read

A read immediately following a write is the one query that cannot tolerate replication lag, and it is also the query most likely to be written without thinking.…

Http::fake, and a test that never touches the network

NoteNovember 17, 20202 min read

Testing code that makes an HTTP call meant injecting a mock client, which means the code had to accept one — so the test shaped the design rather…