https://dubeykartikay.com/Technical essays on search systems, performance engineering, distributed systems, Linux, and developer tools by Kartikay Dubey.Hugoen-usWed, 27 May 2026 10:00:00 +0530https://dubeykartikay.com/posts/go-optimization-pprof/Wed, 27 May 2026 10:00:00 +0530https://dubeykartikay.com/posts/go-optimization-pprof/A hands-on Go pprof tutorial: every command, every output, and every line of annotated source code from optimizing a real terminal log viewer.https://dubeykartikay.com/posts/install-boost-cpp/Wed, 13 May 2026 00:00:00 +0000https://dubeykartikay.com/posts/install-boost-cpp/A complete guide to installing Boost in any C++ project. Covers CMake find_package, FetchContent, vcpkg manifest mode, Conan, manual g++ linking, and building from source with b2.https://dubeykartikay.com/posts/the-shape-of-duplicate-detection/Tue, 12 May 2026 12:00:00 +0530https://dubeykartikay.com/posts/the-shape-of-duplicate-detection/Duplicate detection looks like a solved problem: use a hash set. A benchmark suite of 4050 measurements across finite batches and streaming workloads shows the fastest strategy can be 148x faster than a hash set, or 90,000x slower, depending on what you are deduplicating and what guarantees you need.https://dubeykartikay.com/posts/why-never-use-std-unordered-set/Sun, 03 May 2026 12:17:55 +0530https://dubeykartikay.com/posts/why-never-use-std-unordered-set/std::unordered_set looks like O(1), but in hot C++ loops the memory access pattern can dominate. Here is a duplicate-filtering benchmark with dense ids, sparse ids, Boost dynamic_bitset, sort+unique, and the case where unordered_set wins.https://dubeykartikay.com/posts/reading-algorithms-like-an-engineer/Sun, 03 May 2026 04:00:00 +0530https://dubeykartikay.com/posts/reading-algorithms-like-an-engineer/A dev log about implementing a Vamana-style ANN index from the DiskANN paper, why my first version was slower than brute force, and what it taught me about reading algorithms with implementation in mind.https://dubeykartikay.com/posts/sembed-engine-vector-search-performance/Sun, 26 Apr 2026 00:00:00 +0000https://dubeykartikay.com/posts/sembed-engine-vector-search-performance/A performance story from sembed-engine: the search visited the same number of nodes and returned the same answers, but became much faster by changing what the CPU had to do for every distance calculation.https://dubeykartikay.com/posts/hugo-optimization-zero-js/Sat, 04 Apr 2026 00:00:00 +0000https://dubeykartikay.com/posts/hugo-optimization-zero-js/I recently looked into my blog’s performance and was surprised to find my pages were downloading over 3.6 MB of JavaScript and render-blocking CSS on every load. Here is the step-by-step breakdown of how I reduced my payload and removed JavaScript.https://dubeykartikay.com/posts/kafka-throughput-drop-min-insync-replicas/Thu, 05 Mar 2026 00:00:00 +0000https://dubeykartikay.com/posts/kafka-throughput-drop-min-insync-replicas/Diagnose a Kafka throughput drop after v3.9.0. Learn why min.insync.replicas slows consumers and how to fix performance safely.https://dubeykartikay.com/posts/vector-databases-semantic-search/Mon, 16 Feb 2026 00:00:00 +0000https://dubeykartikay.com/posts/vector-databases-semantic-search/Learn what vector databases are, how semantic search works, and why ANN, DiskANN, and Vamana matter for modern retrieval systems.https://dubeykartikay.com/posts/procedural-generation-no-mans-sky/Mon, 02 Feb 2026 00:00:00 +0000https://dubeykartikay.com/posts/procedural-generation-no-mans-sky/Understand procedural generation in No Man’s Sky, from Perlin noise to layering and domain warping for massive game worlds.https://dubeykartikay.com/posts/hyprland-dual-gpu-gaming-laptops/Mon, 02 Feb 2026 00:00:00 +0000https://dubeykartikay.com/posts/hyprland-dual-gpu-gaming-laptops/Set up dual GPU gaming laptops in Hyprland with the right iGPU priority, video decoding configuration, and battery-saving GPU switching.