[ TOPIC ]

caching

5 real merged PRs across 4 projects, ordered easiest to hardest. Read them in order to see how caching shows up in production code, then go deeper with the free papers and talks below.

[ 01 // REAL PRs ]

Next (mid) · 5

ClickHouse/ClickHouse9/10

Hash the type-derived parameter in the ALP, FPC and GCD codecs

This PR teaches how subtle bugs can arise from missing type-derived parameters in cache keys, how to fix them by updating hash functions, and how to write robust, deterministic regression tests for such issues.

middata-structurescachingerror-handlingtesting-strategy

ClickHouse/ClickHouse9/10

Cache the finalized cardinality in `uniq_v2` statistics

This PR demonstrates how to optimize expensive repeated computations by caching results, including how to safely memoize in a concurrent context and add targeted performance regression tests.

midcachingalgorithmic-optimizationtesting-strategy

argoproj/argo-cd8/10

fix(notification-controller): read appprojects from informer cache

This PR teaches how to improve controller performance and correctness by switching from live API calls to informer cache reads, handling namespace scoping, and tuning client rate limits.

midcachingrate-limitingrefactoring

duckdb/duckdb7/10

[Storage] Add `byte_size` to `DataPointer`

This PR teaches how to robustly handle and report errors in benchmark runners, and how to isolate benchmark runs to avoid cache-related side effects between test variants.

midtesting-strategycachingerror-handling

vuejs/core7/10

fix(runtime-core): avoid caching unmounted suspense children

Demonstrates careful caching logic to avoid invalid state in nested async UI components with a detailed regression test for complex Suspense and KeepAlive interactions.

midcachingerror-handlingtesting-strategydistributed-systems

[ 02 // MUST-READ PAPERS ]

Free to read, ranked by citations.