https://escalopa.com/en/tags/performance/Recent content in Performance on EscalopaHugo -- gohugo.ioenahmed.helaly.dev@google.com (Ahmed Helaly)ahmed.helaly.dev@google.com (Ahmed Helaly)© 2026 Ahmed HelalyFri, 10 Jul 2026 00:00:00 +0000https://escalopa.com/en/posts/designing-bounded-worker-pools-in-go/Fri, 26 Dec 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/designing-bounded-worker-pools-in-go/Bound concurrency at the admission point so overload becomes visible and controllable.https://escalopa.com/en/posts/cancellation-that-actually-propagates-in-go/Wed, 10 Sep 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/cancellation-that-actually-propagates-in-go/A context is useful only when every blocking boundary observes it and cleanup has a clear owner.https://escalopa.com/en/posts/error-chains-you-can-operate-in-go/Sun, 14 Jul 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/error-chains-you-can-operate-in-go/Wrap errors for diagnosis, classify them for policy, and never make callers parse prose.https://escalopa.com/en/posts/graceful-shutdown-without-dropping-requests/Tue, 06 May 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/graceful-shutdown-without-dropping-requests/Shutdown is a protocol: stop admission, drain in-flight work, flush state, then release dependencies.https://escalopa.com/en/posts/choosing-pointers-and-values-in-go-apis/Sun, 01 Sep 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/choosing-pointers-and-values-in-go-apis/Choose receiver and parameter semantics from ownership, mutability, and copy cost rather than habit.https://escalopa.com/en/posts/making-go-http-clients-production-ready/Sun, 28 Jun 2026 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/making-go-http-clients-production-ready/Timeouts, connection reuse, response draining, and retry policy belong in the client design.https://escalopa.com/en/posts/table-driven-tests-that-stay-readable/Sat, 06 Jun 2026 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/table-driven-tests-that-stay-readable/A good table captures behavior dimensions without hiding the arrange-act-assert story.https://escalopa.com/en/posts/race-free-in-memory-caches-in-go/Thu, 31 Jul 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/race-free-in-memory-caches-in-go/Correct cache synchronization must cover compound operations, expiry, and loader duplication.https://escalopa.com/en/posts/when-channels-are-the-wrong-abstraction/Wed, 20 Nov 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/when-channels-are-the-wrong-abstraction/Use channels for ownership transfer and coordination, not as a universal replacement for locks.https://escalopa.com/en/posts/building-backpressure-into-go-pipelines/Sat, 05 Oct 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/building-backpressure-into-go-pipelines/A pipeline without bounded queues and cancellation is an outage amplifier.https://escalopa.com/en/posts/profiling-go-services-with-pprof/Tue, 12 Aug 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/profiling-go-services-with-pprof/Profile the constrained resource under representative load before changing code.https://escalopa.com/en/posts/reducing-allocations-in-hot-go-paths/Thu, 12 Dec 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/reducing-allocations-in-hot-go-paths/Allocation work starts with profiles and escape analysis, then targets lifetime and representation.https://escalopa.com/en/posts/safe-configuration-loading-in-go/Thu, 07 May 2026 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/safe-configuration-loading-in-go/Parse once, validate completely, expose immutable typed configuration, and fail before serving traffic.https://escalopa.com/en/posts/functional-options-without-api-confusion/Thu, 23 Oct 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/functional-options-without-api-confusion/Options help optional construction only when defaults, validation, and option interaction remain obvious.https://escalopa.com/en/posts/interfaces-at-the-point-of-use/Sun, 25 Jan 2026 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/interfaces-at-the-point-of-use/Small consumer-owned interfaces reduce coupling and make tests describe real dependencies.https://escalopa.com/en/posts/structured-concurrency-patterns-in-go/Sat, 07 Dec 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/structured-concurrency-patterns-in-go/Child goroutines should share cancellation, error propagation, and a bounded lifetime with their parent.https://escalopa.com/en/posts/avoiding-goroutine-leaks/Sun, 20 Oct 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/avoiding-goroutine-leaks/Every goroutine needs an exit condition that remains reachable when downstream work stops.https://escalopa.com/en/posts/benchmarking-go-code-without-lying-to-yourself/Fri, 16 Aug 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/benchmarking-go-code-without-lying-to-yourself/Benchmarks need stable inputs, allocation reporting, multiple runs, and a comparison tied to user impact.https://escalopa.com/en/posts/designing-stable-go-packages/Fri, 07 Mar 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/designing-stable-go-packages/A package is stable when its responsibilities, exported surface, and dependency direction are narrow.https://escalopa.com/en/posts/building-a-generic-ttl-cache-in-go/Sun, 15 Dec 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/building-a-generic-ttl-cache-in-go/Generics can remove unsafe casts while explicit synchronization and expiry semantics preserve correctness.https://escalopa.com/en/posts/postgresql-indexes-from-query-shape/Tue, 25 Mar 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/postgresql-indexes-from-query-shape/Design indexes from predicates, join keys, ordering, selectivity, and write cost together.https://escalopa.com/en/posts/reading-explain-analyze-without-guessing/Wed, 20 May 2026 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/reading-explain-analyze-without-guessing/Compare estimated and actual rows first, then find where time, loops, or memory multiply.https://escalopa.com/en/posts/transaction-isolation-through-anomalies/Wed, 19 Feb 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/transaction-isolation-through-anomalies/Choose isolation by naming the anomaly that would violate a business invariant.https://escalopa.com/en/posts/the-lost-update-and-how-to-prevent-it/Sat, 12 Apr 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/the-lost-update-and-how-to-prevent-it/Atomic updates, locks, or optimistic versions must protect read-modify-write as one decision.https://escalopa.com/en/posts/keyset-pagination-in-postgresql/Thu, 29 Aug 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/keyset-pagination-in-postgresql/Seek from the last ordered key to keep page cost stable and results coherent.https://escalopa.com/en/posts/zero-downtime-schema-migrations/Fri, 09 May 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/zero-downtime-schema-migrations/Expand, migrate, verify, switch, and contract across independently deployed application versions.https://escalopa.com/en/posts/redis-caching-without-stale-data-surprises/Wed, 16 Oct 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/redis-caching-without-stale-data-surprises/Define ownership, expiry, invalidation, stampede control, and degraded behavior before adding cache code.https://escalopa.com/en/posts/cache-stampede-protection/Fri, 10 Jul 2026 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/cache-stampede-protection/Request coalescing, early refresh, and jitter keep one expiry from becoming a dependency spike.https://escalopa.com/en/posts/kafka-partitioning-and-consumer-parallelism/Sun, 02 Mar 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/kafka-partitioning-and-consumer-parallelism/The key determines ordering and skew; partition count sets the ceiling for group parallelism.https://escalopa.com/en/posts/kafka-delivery-semantics-in-practice/Thu, 18 Sep 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/kafka-delivery-semantics-in-practice/Offsets and side effects must share a recoverable protocol to survive crashes between them.https://escalopa.com/en/posts/clickhouse-table-design-for-event-analytics/Sat, 03 Aug 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/clickhouse-table-design-for-event-analytics/Partition for lifecycle, order for filtering locality, and measure cardinality before choosing codecs.https://escalopa.com/en/posts/etcd-transactions-for-coordination/Tue, 04 Mar 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/etcd-transactions-for-coordination/Compare-and-swap plus leases can encode ownership, but clients must handle revision and expiry races.https://escalopa.com/en/posts/postgis-nearest-neighbor-queries/Tue, 11 Nov 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/postgis-nearest-neighbor-queries/Use spatial indexes and distance operators that preserve indexability before calculating exact distance.https://escalopa.com/en/posts/connection-pools-are-capacity-limits/Mon, 18 Nov 2024 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/connection-pools-are-capacity-limits/Pool size must reflect database concurrency, transaction duration, and queueing—not application goroutine count.https://escalopa.com/en/posts/choosing-between-redis-and-memcached/Wed, 19 Nov 2025 00:00:00 +0000ahmed.helaly.dev@google.com (Ahmed Helaly)https://escalopa.com/en/posts/choosing-between-redis-and-memcached/Choose from data model, persistence, operations, clustering, and failure behavior rather than benchmark headlines.