@sketchlog/wasm

Bounded-memory SketchLog runtime compiled to WebAssembly.

npm install @sketchlog/wasm

const { StreamLog } = require("@sketchlog/wasm");

await StreamLog.init();
const log = new StreamLog();
log.addBatch([10, 20, 30]);
console.log(log.p99);
log.destroy();

Call StreamLog.init() before constructing a log and call destroy() when the instance is no longer needed. Serialized 64-bit counters are decimal strings so they remain precise across JavaScript runtimes and can be merged through the SketchLog server.

Browser bundlers must serve the packaged dist/sketchlog.wasm asset and make its URL available to the Emscripten loader. See the WASM documentation for browser and server-merge examples.

Source development

Docker is the only build prerequisite. From wasm/, run:

npm ci
npm test

npm test builds the runtime with a digest-pinned Emscripten image before running the Node smoke test, so a clean checkout does not depend on a hidden prebuilt dist/ directory. If the pinned image is not already cached, the build retries transient registry failures three times with bounded backoff and then runs with --pull=never.