GitHub - privatenumber/minification-benchmarks: 🏃‍♂️🏃‍♀️🏃 JS minification benchmarks: babel-minify, esbuild, terser, uglify-js, swc, google closure compiler, tdewolff/minify

🏃‍♂️🏃‍♀️🏃 JS minification benchmarks

This repo is routinely maintained to compare the quality and speed across the latest versions of the following JavaScript minifiers:

Benchmarks last updated on Aug 13, 2022.

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🙋‍♂️ Why?

To help you pick a minifier that fits your needs
To promote JS minifiers and document their performances
To encourage healthy competition and improvement amongst minifiers

👟 Methodology

Each minifier is executed in its own process with a 20 second timeout
Artifact integrity is verified by a test before and after minification
Minifier upgrade PRs are automated via WhiteSource Renovate
Benchmarks are gathered on every PR via GitHub Actions (verifiable minified artifacts are uploaded on each run)

⏱ Metrics

Minifiers are ranked by smallest minzipped size.

Minified size

Size of the minified output.

Minzipped size

Size of the minified output with Gzip compression.

For minifiers, this measures how compressable the output is.

For users, this measures network transfer size, which is usually the metric that matters most.

Time

How long minification took (average of 5 runs). Each time is annotated with a multiplier relative to the fastest minifier.

📋 Results

Artifact	Original size	Gzip size
react v17.0.2 (Source)	`72.14 kB`	`19.41 kB`
Minifier	Minified size	Minzipped size	Time
google-closure-compiler	^-68%`22.83 kB`	^🏆-58%`8.17 kB`	^206x`4,691 ms`
uglify-js	^🏆-69%`22.69 kB`	^-58%`8.20 kB`	^42x`959 ms`
swc	^-68%`22.98 kB`	^-57%`8.26 kB`	^1x`39 ms`
terser	^-68%`23.12 kB`	^-57%`8.29 kB`	^20x`474 ms`
babel-minify	^-67%`23.60 kB`	^-57%`8.43 kB`	^68x`1,555 ms`
esbuild	^-67%`23.70 kB`	^-56%`8.53 kB`	^1x`36 ms`
tdewolff-minify	^-67%`23.53 kB`	^-56%`8.62 kB`	^🏆`23 ms`
uglify-js.no-compress	^-65%`25.03 kB`	^-55%`8.65 kB`	^7x`180 ms`
terser.no-compress	^-65%`25.08 kB`	^-55%`8.72 kB`	^9x`217 ms`

Artifact	Original size	Gzip size
moment v2.29.1 (Source)	`173.90 kB`	`36.15 kB`
Minifier	Minified size	Minzipped size	Time
uglify-js	^🏆-67%`57.92 kB`	^🏆-49%`18.46 kB`	^77x`2,135 ms`
terser	^-66%`59.06 kB`	^-49%`18.53 kB`	^45x`1,264 ms`
google-closure-compiler	^-66%`58.27 kB`	^-48%`18.75 kB`	^198x`5,512 ms`
swc	^-66%`58.86 kB`	^-48%`18.83 kB`	^2x`83 ms`
babel-minify	^-66%`59.70 kB`	^-47%`19.02 kB`	^113x`3,141 ms`
esbuild	^-66%`59.83 kB`	^-47%`19.25 kB`	^1x`43 ms`
tdewolff-minify	^-66%`59.94 kB`	^-46%`19.42 kB`	^🏆`28 ms`
uglify-js.no-compress	^-64%`62.50 kB`	^-46%`19.44 kB`	^13x`385 ms`
terser.no-compress	^-64%`63.15 kB`	^-46%`19.56 kB`	^19x`538 ms`

Artifact	Original size	Gzip size
jquery v3.5.1 (Source)	`287.63 kB`	`84.37 kB`
Minifier	Minified size	Minzipped size	Time
uglify-js	^🏆-69%`88.56 kB`	^🏆-63%`30.86 kB`	^47x`3,012 ms`
terser	^-69%`89.88 kB`	^-63%`30.93 kB`	^30x`1,931 ms`
swc	^-69%`89.26 kB`	^-63%`30.94 kB`	^2x`167 ms`
tdewolff-minify	^-69%`89.85 kB`	^-63%`31.44 kB`	^🏆`63 ms`
uglify-js.no-compress	^-67%`94.08 kB`	^-63%`31.44 kB`	^8x`522 ms`
terser.no-compress	^-67%`94.55 kB`	^-63%`31.59 kB`	^11x`736 ms`
babel-minify	^-68%`92.10 kB`	^-62%`31.75 kB`	^80x`5,089 ms`
esbuild	^-69%`90.07 kB`	^-62%`31.89 kB`	^1x`83 ms`
google-closure-compiler	^-68%`92.70 kB`	^-61%`32.98 kB`	^97x`6,099 ms`

Artifact	Original size	Gzip size
vue v2.6.12 (Source)	`342.15 kB`	`89.52 kB`
Minifier	Minified size	Minzipped size	Time
terser	^-66%`116.77 kB`	^🏆-52%`42.83 kB`	^34x`2,365 ms`
uglify-js	^🏆-67%`114.15 kB`	^-52%`42.88 kB`	^57x`3,917 ms`
swc	^-66%`116.54 kB`	^-52%`42.95 kB`	^3x`207 ms`
babel-minify	^-66%`117.90 kB`	^-51%`43.83 kB`	^79x`5,421 ms`
google-closure-compiler	^-66%`115.60 kB`	^-51%`44.05 kB`	^94x`6,488 ms`
esbuild	^-65%`118.16 kB`	^-51%`44.25 kB`	^1x`93 ms`
uglify-js.no-compress	^-63%`126.14 kB`	^-50%`44.36 kB`	^8x`606 ms`
tdewolff-minify	^-66%`117.83 kB`	^-50%`44.37 kB`	^🏆`68 ms`
terser.no-compress	^-63%`126.58 kB`	^-50%`44.57 kB`	^13x`918 ms`

Artifact	Original size	Gzip size
lodash v4.17.21 (Source)	`544.10 kB`	`96.40 kB`
Minifier	Minified size	Minzipped size	Time
uglify-js	^🏆-87%`68.51 kB`	^🏆-74%`24.59 kB`	^76x`3,339 ms`
google-closure-compiler	^-86%`73.47 kB`	^-74%`24.84 kB`	^145x`6,336 ms`
terser	^-87%`71.09 kB`	^-74%`25.06 kB`	^47x`2,067 ms`
swc	^-87%`70.49 kB`	^-74%`25.30 kB`	^4x`200 ms`
babel-minify	^-87%`72.37 kB`	^-74%`25.37 kB`	^102x`4,464 ms`
uglify-js.no-compress	^-86%`74.61 kB`	^-73%`25.76 kB`	^13x`577 ms`
esbuild	^-87%`72.49 kB`	^-73%`26.06 kB`	^1x`63 ms`
terser.no-compress	^-86%`75.67 kB`	^-73%`26.10 kB`	^19x`848 ms`
tdewolff-minify	^-87%`72.47 kB`	^-73%`26.32 kB`	^🏆`44 ms`

Artifact	Original size	Gzip size
d3 v6.3.1 (Source)	`555.77 kB`	`129.99 kB`
Minifier	Minified size	Minzipped size	Time
uglify-js	^🏆-52%`264.26 kB`	^🏆-33%`86.82 kB`	^72x`7,202 ms`
terser	^-52%`267.99 kB`	^-33%`87.66 kB`	^52x`5,211 ms`
swc	^-52%`266.20 kB`	^-32%`87.95 kB`	^5x`566 ms`
uglify-js.no-compress	^-50%`275.35 kB`	^-32%`88.30 kB`	^12x`1,255 ms`
terser.no-compress	^-50%`276.47 kB`	^-32%`88.99 kB`	^22x`2,246 ms`
tdewolff-minify	^-51%`269.93 kB`	^-31%`89.70 kB`	^🏆`100 ms`
esbuild	^-51%`270.18 kB`	^-30%`90.42 kB`	^1x`148 ms`
google-closure-compiler	^-51%`270.30 kB`	^-28%`93.48 kB`	^90x`9,007 ms`
babel-minify _{Failed to minify}	—	—	—

Artifact	Original size	Gzip size
terser v5.14.2 (Source)	`955.22 kB`	`182.84 kB`
Minifier	Minified size	Minzipped size	Time
uglify-js	^-55%`432.81 kB`	^🏆-36%`117.92 kB`	^103x`6,712 ms`
terser	^-54%`438.01 kB`	^-35%`118.00 kB`	^71x`4,649 ms`
terser.no-compress	^-53%`452.86 kB`	^-35%`118.87 kB`	^29x`1,882 ms`
uglify-js.no-compress	^-53%`450.63 kB`	^-35%`118.97 kB`	^18x`1,220 ms`
tdewolff-minify	^-54%`436.31 kB`	^-35%`119.19 kB`	^🏆`65 ms`
google-closure-compiler	^🏆-56%`420.28 kB`	^-34%`120.24 kB`	^130x`8,460 ms`
esbuild	^-54%`438.60 kB`	^-34%`120.67 kB`	^1x`110 ms`
swc	^-49%`483.38 kB`	^-32%`123.50 kB`	^6x`408 ms`
babel-minify _{Failed to minify}	—	—	—

Artifact	Original size	Gzip size
three v0.124.0 (Source)	`1.25 MB`	`247.75 kB`
Minifier	Minified size	Minzipped size	Time
uglify-js	^🏆-48%`642.60 kB`	^🏆-36%`158.26 kB`	^98x`9,454 ms`
terser	^-48%`653.38 kB`	^-36%`158.57 kB`	^73x`7,056 ms`
swc	^-48%`644.47 kB`	^-36%`158.91 kB`	^7x`733 ms`
google-closure-compiler	^-48%`644.45 kB`	^-35%`161.84 kB`	^114x`10,916 ms`
uglify-js.no-compress	^-46%`674.49 kB`	^-35%`162.17 kB`	^19x`1,855 ms`
terser.no-compress	^-46%`675.60 kB`	^-34%`162.35 kB`	^30x`2,917 ms`
esbuild	^-48%`646.78 kB`	^-34%`162.65 kB`	^1x`153 ms`
tdewolff-minify	^-48%`644.89 kB`	^-34%`163.91 kB`	^🏆`96 ms`
babel-minify _{Timed out}	—	—	—

Artifact	Original size	Gzip size
victory v35.8.4 (Source)	`2.14 MB`	`309.06 kB`
Minifier	Minified size	Minzipped size	Time
uglify-js	^🏆-67%`703.98 kB`	^🏆-49%`157.56 kB`	^75x`11,611 ms`
terser	^-66%`715.74 kB`	^-49%`158.16 kB`	^63x`9,867 ms`
swc	^-67%`711.97 kB`	^-48%`160.16 kB`	^6x`1,054 ms`
tdewolff-minify	^-66%`718.74 kB`	^-47%`164.50 kB`	^🏆`154 ms`
terser.no-compress	^-64%`759.34 kB`	^-46%`165.72 kB`	^23x`3,645 ms`
uglify-js.no-compress	^-65%`756.53 kB`	^-46%`166.88 kB`	^15x`2,345 ms`
google-closure-compiler	^-67%`705.87 kB`	^-44%`174.20 kB`	^85x`13,146 ms`
esbuild	^-66%`724.21 kB`	^-42%`179.78 kB`	^1x`244 ms`
babel-minify _{Failed to minify}	—	—	—

Artifact	Original size	Gzip size
echarts v5.1.1 (Source)	`3.20 MB`	`683.47 kB`
Minifier	Minified size	Minzipped size	Time
terser	^🏆-69%`1.00 MB`	^🏆-53%`321.26 kB`	^54x`16,215 ms`
swc	^-69%`1.00 MB`	^-53%`323.10 kB`	^10x`3,232 ms`
terser.no-compress	^-66%`1.07 MB`	^-52%`329.73 kB`	^23x`7,094 ms`
uglify-js.no-compress	^-67%`1.07 MB`	^-52%`330.46 kB`	^10x`3,135 ms`
esbuild	^-68%`1.01 MB`	^-52%`330.87 kB`	^1x`413 ms`
tdewolff-minify	^-68%`1.01 MB`	^-52%`331.30 kB`	^🏆`296 ms`
babel-minify _{Timed out}	—	—	—
google-closure-compiler _{Timed out}	—	—	—
uglify-js _{Timed out}	—	—	—

Artifact	Original size	Gzip size
antd v4.16.1 (Source)	`6.69 MB`	`825.74 kB`
Minifier	Minified size	Minzipped size	Time
swc	^🏆-66%`2.25 MB`	^🏆-44%`460.86 kB`	^8x`3,205 ms`
tdewolff-minify	^-66%`2.30 MB`	^-43%`473.23 kB`	^🏆`385 ms`
terser.no-compress	^-64%`2.43 MB`	^-42%`476.68 kB`	^20x`7,875 ms`
uglify-js.no-compress	^-64%`2.42 MB`	^-42%`479.73 kB`	^11x`4,372 ms`
esbuild	^-66%`2.31 MB`	^-41%`488.10 kB`	^1x`623 ms`
babel-minify _{Timed out}	—	—	—
google-closure-compiler _{Timed out}	—	—	—
terser _{Timed out}	—	—	—
uglify-js _{Timed out}	—	—	—

Artifact	Original size	Gzip size
typescript v4.6.4 (Source)	`10.09 MB`	`1.77 MB`
Minifier	Minified size	Minzipped size	Time
uglify-js.no-compress	^-67%`3.33 MB`	^🏆-53%`828.15 kB`	^9x`8,714 ms`
tdewolff-minify	^🏆-69%`3.17 MB`	^-53%`829.76 kB`	^1x`1,060 ms`
terser.no-compress	^-67%`3.32 MB`	^-53%`831.17 kB`	^15x`14,355 ms`
esbuild	^-67%`3.28 MB`	^-51%`863.80 kB`	^🏆`940 ms`
babel-minify _{Timed out}	—	—	—
google-closure-compiler _{Timed out}	—	—	—
swc _{Invalid output: TypeError}	—	—	—
terser _{Timed out}	—	—	—
uglify-js _{Timed out}	—	—	—

Want to see more projects listed? PRs welcome! See the contribution guide for more info.

🥇 Results

Best minification performance

UglifyJS takes first place for the smallest uncompressed minified size for all races, and wins 9 out of 11 races for minzipped size! Impressively, it's still written in ES5 but can handle ES6 up to ES2020.

Terser takes a very close second, only short by at most by 1% in minzipped size while performing twice as fast as Uglify! Terser is a fork of UglifyJS and comes with support for ES6+.

Fastest minifier

esbuild runs 10x+ laps around everyone else! The Go-lang JS minifier/bundler is a beast of its own. Not only is it insanely fast, but demonstrates very competitive minification abilities, usually performing closely to Terser while supporting cutting-edge ESNext syntax. However, note that esbuild has a limited set of optimizations and there are currently no plans to improve it.

⚡️ Pro Tip: Harness the speed of esbuild in your Webpack build for minification (and even transpilation) with esbuild-loader.

Definitely keep an eye out for swc, the JS compiler written in Rust. It's also blazing fast and rumor has it they're stepping up their minification.

Jul	AUG	Sep
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2021	2022	2023

readme.md

🏃‍♂️🏃‍♀️🏃 JS minification benchmarks

🙋‍♂️ Why?

👟 Methodology

⏱ Metrics

Minified size

Minzipped size

Time

📋 Results

🥇 Results

Best minification performance

Fastest minifier

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readme.md

🏃‍♂️🏃‍♀️🏃 JS minification benchmarks

🙋‍♂️ Why?

👟 Methodology

⏱ Metrics

Minified size

Minzipped size

Time

📋 Results

🥇 Results

Best minification performance

Fastest minifier

About

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