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Fast TypeScript/JavaScript transformer without node-gyp and postinstall script.
Run TypeScript with node, without compilation or typechecking:
npm i -D @swc-node/register node -r @swc-node/register script.ts node --import @swc-node/register/esm-register script.ts # for esm project with node>=20.6 node --loader @swc-node/register/esm script.ts # for esm project with node<=20.5, deprecated
Pass --enable-source-maps to node for esm projects
Set environment variable SWCRC=true when you would like to load .swcrc file
SWCRC=true node -r @swc-node/register script.ts
#!/usr/bin/env -S node --import @swc-node/register/esm-register
// your coderun with shebang, add TS_NODE_PROJECT=null(#!/usr/bin/env TS_NODE_PROJECT=null node --import @swc-node/register/esm-register) to use ignore tsconfig.json
Fastest TypeScript transformer.
Detail: @swc-node/core
transform RxJS
AjaxObservable.tsto ES2015 & CommonJSJavaScript. Benchmark code: bench
Hardware info:
Model Name: MacBook Pro
Model Identifier: MacBookPro15,1
Processor Name: 6-Core Intel Core i7
Processor Speed: 2.6 GHz
Number of Processors: 1
Total Number of Cores: 6
L2 Cache (per Core): 256 KB
L3 Cache: 12 MB
Hyper-Threading Technology: Enabled
Memory: 16 GB
esbuild x 510 ops/sec ±1.28% (88 runs sampled) @swc-node/core x 438 ops/sec ±1.00% (88 runs sampled) typescript x 28.83 ops/sec ±10.20% (52 runs sampled) babel x 24.21 ops/sec ±10.66% (46 runs sampled) Transform rxjs/AjaxObservable.ts benchmark bench suite: Fastest is esbuild
UV_THREADPOOL_SIZE=11 yarn bench
@swc-node/core x 1,253 ops/sec ±0.90% (75 runs sampled) esbuild x 914 ops/sec ±1.31% (77 runs sampled) Transform rxjs/AjaxObservable.ts parallel benchmark bench suite: Fastest is @swc-node/core
yarn bench
@swc-node/core x 1,123 ops/sec ±0.95% (77 runs sampled) esbuild x 847 ops/sec ±3.74% (71 runs sampled) Transform rxjs/AjaxObservable.ts parallel benchmark bench suite: Fastest is @swc-node/core
Fastest jest TypeScript transformer.
Detail: @swc-node/jest
Testing in pure
TypeScriptproject, compile target isES2018. Running withnpx jest --no-cache,ts-jestwas configured withisolatedModules: true
Test Suites: 49 passed, 49 total
Tests: 254 passed, 254 total
Snapshots: 53 passed, 53 total
Time: 54.631 s
Ran all test suites.
✨ Done in 62.71s.
Test Suites: 49 passed, 49 total
Tests: 254 passed, 254 total
Snapshots: 53 passed, 53 total
Time: 10.511 s
Ran all test suites.
✨ Done in 14.34s.
Faster ts-node/register/transpile-only alternative.
Detail: @swc-node/register
pnpm i
-
pnpm build -
pnpm test