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TypeScript runtime comparisons

Comparison of Node.js TypeScript runtimes.

Disclaimer: This comparison is by the author & maintainer of tsx

Compared runtimes

Methodology

  • Tested on Node.js v12.20.0 because they all support it, and the node: prefix is not supported in require()

  • Tested in both package types commonjs & module when applicable

Symbols

Symbol Description
✅ Pass (Sometimes clickable)
❌ Fail
⛔️ Error (Hover to see error message)

Project stats

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
npm downloads
Install size
GitHub stars
Issues open
Issues closed
Last commit

Transformation

Supported transformation features and code tranformation correctness.

Package type: CommonJS

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
TypeScript syntax ✅ ✅ ✅ ✅ ✅ ✅ ✅
ESM → CJS: import/export syntax ✅ ❌ ✅ ✅ ✅ ✅ ❌
ESM → CJS: import.meta.url shim ✅ ❌ ❌ ✅ ❌ ❌ ❌
CJS scope in .js file ✅ ✅ ✅ ✅ ✅ ✅ ✅
CJS scope in .ts file ✅ ✅ ✅ ✅ ✅ ✅ ❌
CJS scope in .cjs file ✅ ✅ ✅ ✅ ✅ ✅ ✅
CJS scope in .cts file ✅ ✅ ✅ ✅ ✅ ✅ ❌
No CJS scope in .mjs file ✅ ✅ ✅ ❌ ✅ ✅ ✅
No CJS scope in .mts file ✅ ❌ ❌ ❌ ❌ ✅ ✅
Source maps ✅ ✅ ✅ ❌ ❌ ✅ ✅

Package type: Module

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
TypeScript syntax ✅ ⛔️ ⛔️ ✅ ⛔️ ✅ ✅
CJS scope in .cjs file ✅ ✅ ✅ ✅ ✅ ✅ ✅
CJS scope in .cts file ✅ ⛔️ ⛔️ ✅ ⛔️ ✅ ❌
No CJS scope in .js file ✅ ✅ ✅ ❌ ✅ ✅ ✅
No CJS scope in .ts file ✅ ⛔️ ⛔️ ❌ ⛔️ ✅ ✅
No CJS scope in .mjs file ✅ ✅ ✅ ❌ ✅ ✅ ✅
No CJS scope in .mts file ✅ ⛔️ ⛔️ ❌ ⛔️ ✅ ✅
Source maps ✅ ⛔️ ⛔️ ❌ ⛔️ ✅ ✅

* CommonJS scope (CJS scope) refers to having the following variables available in the module scope: module, exports, require, __filename, __dirname.

Resolution

Whether require()/import() can resolve a given specifier.

require()

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
.ts file ✅ ✅ ✅ ✅ ✅ ✅ ✅
.ts file via .js ✅ ❌ ❌ ❌ ❌ ✅ ❌
.ts file without extension ✅ ✅ ✅ ✅ ✅ ✅ ❌
index.ts file via directory ✅ ✅ ✅ ✅ ✅ ✅ ❌
.cts file ✅ ✅ ✅ ✅ ✅ ✅ ✅
.cts file via .cjs ✅ ❌ ❌ ❌ ❌ ✅ ❌
.mts file ✅ ✅ ✅ ✅ ✅ ❌ ✅
.mts file via .mjs ✅ ❌ ❌ ❌ ❌ ❌ ❌
node: prefix ✅ ❌ ❌ ✅ ❌ ❌ ✅
tsconfig.json paths ✅ ❌ ❌ ❌ ❌ ❌ ❌

import()

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
.ts file ✅ ❌ ❌ ❌ ✅ ✅ ✅
.ts file via .js ✅ ❌ ❌ ❌ ❌ ✅ ✅
.ts file without extension ✅ ❌ ❌ ❌ ✅ ❌ ✅
index.ts file via directory ✅ ❌ ❌ ❌ ✅ ❌ ❌
.cts file ✅ ❌ ❌ ❌ ✅ ✅ ✅
.cts file via .cjs ✅ ❌ ❌ ❌ ❌ ✅ ✅
.mts file ✅ ❌ ❌ ❌ ✅ ✅ ✅
.mts file via .mjs ✅ ❌ ❌ ❌ ❌ ✅ ✅
tsconfig.json paths ✅ ❌ ❌ ❌ ❌ ❌ ❌

Interoperability

Whether it can correctly load a file for interoperability.

Package type: CommonJS

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
require() .js file (ESM export) ✅ ⛔️ ✅ ✅ ✅ ✅ ⛔️
require() .ts file (ESM export) ✅ ⛔️ ✅ ✅ ✅ ✅ ⛔️
require() .cjs file ✅ ✅ ✅ ✅ ✅ ✅ ✅
require() .cts file ✅ ✅ ✅ ✅ ✅ ✅ ✅
require() .mjs file ✅ ⛔️ ✅ ✅ ⛔️ ⛔️ ⛔️
require() .mts file ✅ ⛔️ ⛔️ ✅ ⛔️ ⛔️ ⛔️
import() .js file (ESM export) ✅ ⛔️ ❌ ⛔️ ✅ ❌ ⛔️
import() .ts file (ESM export) ✅ ⛔️ ⛔️ ⛔️ ✅ ❌ ✅
import() .cjs file ✅ ✅ ✅ ✅ ❌ ✅ ✅
import() .cts file ✅ ⛔️ ⛔️ ⛔️ ❌ ✅ ✅
import() .mjs file ✅ ✅ ✅ ✅ ⛔️ ✅ ✅
import() .mts file ✅ ⛔️ ⛔️ ⛔️ ⛔️ ✅ ✅

Package type: Module

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
require() .js file (ESM export) ✅ ⛔️ ⛔️ ⛔️ ⛔️ ⛔️ ⛔️
require() .ts file (ESM export) ✅ ⛔️ ✅ ⛔️ ✅ ⛔️ ⛔️
require() .cjs file ✅ ✅ ✅ ✅ ✅ ✅ ✅
require() .cts file ✅ ✅ ✅ ✅ ✅ ✅ ✅
require() .mjs file ✅ ⛔️ ✅ ⛔️ ⛔️ ⛔️ ⛔️
require() .mts file ✅ ⛔️ ⛔️ ⛔️ ⛔️ ⛔️ ⛔️
import() .js file (ESM export) ✅ ✅ ✅ ✅ ✅ ✅ ✅
import() .ts file (ESM export) ✅ ⛔️ ⛔️ ✅ ⛔️ ✅ ✅
import() .cjs file ✅ ✅ ✅ ❌ ✅ ✅ ✅
import() .cts file ✅ ⛔️ ⛔️ ❌ ⛔️ ✅ ✅
import() .mjs file ✅ ✅ ✅ ✅ ✅ ✅ ✅
import() .mts file ✅ ⛔️ ⛔️ ✅ ⛔️ ✅ ✅

Performance features

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
Compiler esbuild SWC esbuild Babel Sucrase (Babel fork) TypeScript / SWC esbuild
Disk cache ✅ ? ❌ ✅ ? ✅ ? ❌ ❌ ? ❌

DX features

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
TypeScript REPL ✅ ? ❌ ❌ ❌ ❌ ✅ ? ❌
Watch mode ✅ ? ❌ ❌ ❌ ❌ ❌ ❌
Type checking ❌ ❌ ❌ ❌ ❌ ✅ ❌
Hides experimental feature warnings ✅ - - - - ✅ ? ❌
Binaries tsx swc-node esr jiti sucrase-node ts-node, ts-node-esm, +4 tsm

Testing

tsx @swc/register esbuild-runner jiti sucrase ts-node tsm
Operating systems Linux & Windows Linux No tests Linux & Windows Linux Linux & Windows Linux & Windows
Node.js versions 12.20 ~ 18 Latest LTS No tests 16 14 & 16 12 ~ 18 + Nightly 12.22.10 ~ 16.14