ThreeJS 77 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 966900 bytes (944.2k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 507498 bytes (495.6k, 52%).

After GZIP compression these minified files vary in size:

Boot	145671 bytes (142.3k)	CDN
cdnjs	120917 bytes (118.1k)	CDN
unpkg	120390 bytes (117.6k)	CDN
gzip -6 (default)	119637 bytes (116.8k)	local copy
Google	119549 bytes (116.7k)	CDN
gzip -9	119203 bytes (116.4k)	local copy
libdeflate -12	114958 bytes (112.3k)	local copy
7zip -mx=9 -tgzip	114878 bytes (112.2k)	local copy
zultra	114877 bytes (112.2k)	local copy
pigz -11 -n	114543 bytes (111.9k)	local copy
kzip -s0 -rn -b0	114510 bytes (111.8k)	local copy
Zopfli	114483 bytes (111.8k)	local copy
Zopfli (defluff)	114481 bytes (111.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r77.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 77 file, ETag caching is available and
if your browser doesn't support GZIP decompression then the uncompressed version will be sent.

Currently best Zopfli settings

Save 5066 bytes by using my ThreeJS 77 Zopfli version instead of the best available CDN (4.43% smaller than Google, 114483 vs. 119549 bytes):

Download

You can use my super-compressed files for whatever purpose you like as long as you respect the library's original license agreement.
There are no restrictions from my side - but please avoid hot-linking if you run a high-traffic website.

These command-line settings yielded the best compression ratio so far (Linux version of zopfli-krzymod):
zopfli --i1000000 --mb8 --mls8192 --bsr21 --lazy --ohh

(found May 24, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	8192	--mls8192
block splitting recursion	21	--bsr21
lazy matching in LZ77	yes	--lazy
optimized Huffman headers	yes	--ohh
initial random W for iterations	1	--rw1
initial random Z for iterations	2	--rz2

Even Smaller Files Thanks To Defluff

Zopfli's output can be further optimized by the defluff tool.
In this particular case, defluff saves 2 more bytes (114481 bytes).

Download

Verify file integrity

After decompression, my uncompressed files are identical to the original ones:

MD5:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r77/build/three.min.js --location | md5sum
f0e8cccfb631c5b5571889c857d6600a -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r77.min.zopfli.js.gz | md5sum
f0e8cccfb631c5b5571889c857d6600a -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r77/build/three.min.js --location | sha1sum
df3edc7fbf65b8ac50c7fe75253c86082ac21333 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r77.min.zopfli.js.gz | sha1sum
df3edc7fbf65b8ac50c7fe75253c86082ac21333 -

These CDNs send you the original file:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Google	119549 bytes	f0e8cccfb631c5b5571889c857d6600a	December 20, 2016 @ 14:06

And some CDNs send you a different file:

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
Boot	145671 bytes	5751a8e036c643ab20312ac8845f9c87	< g;++f)b[f].evaluate(c),e[f].accumulate(d,a)}},_updateWeigh [...] < this.timeScale=b)}}return this._effectiveTimeScale=b},_upd [...] > g;++f)b[f].evaluate(c),e[f].accumulate(d,a)}},_updateWeigh [...] > this.timeScale=b)}}return this._effectiveTimeScale=b},_upd [...] < THREE.WebGLExtensions=function(a){var b={};this.get=functi [...] > THREE.WebGLExtensions=function(a){var b={};this.get=functi [...]	(invalid)
cdnjs	120917 bytes	5751a8e036c643ab20312ac8845f9c87	< g;++f)b[f].evaluate(c),e[f].accumulate(d,a)}},_updateWeigh [...] < this.timeScale=b)}}return this._effectiveTimeScale=b},_upd [...] > g;++f)b[f].evaluate(c),e[f].accumulate(d,a)}},_updateWeigh [...] > this.timeScale=b)}}return this._effectiveTimeScale=b},_upd [...] < THREE.WebGLExtensions=function(a){var b={};this.get=functi [...] > THREE.WebGLExtensions=function(a){var b={};this.get=functi [...]	(invalid)
unpkg	120390 bytes	ae0d7d3323c69bdfcb6872bedeada8b0	< // threejs.org/license > var self = self \|\| {};// threejs.org/license > > // Export the THREE object for Node.js, with > // backwards-compatibility for the old `require()` API. If [...] > // the browser, add `_` as a global object via a string id [...] > // for Closure Compiler "advanced" mode. > if (typeof exports !== 'undefined') { > if (typeof module !== 'undefined' && module.exports) { > exports = module.exports = THREE; [...]	July 11, 2016 @ 15:49

Note: only the MD5 hashes are shown to keep things simple.

Other Versions

Available ThreeJS versions at minime.stephan-brumme.com:

148, 147, 146, 145, 144, 143, 142, 141, 140, 139, 138, 137, 136, 135, 134, 133, 132, 131, 130, 129, 128, 127, 126, 125, 124, 123, 122, 121, 120, 119, 118, 117, 116, 115, 114, 113, 112, 111, 110, 109, 108, 107, 106, 105, 104, 103, 102, 101, 100, 99, 98, 97, 96, 95, 94, 93, 92, 91, 90, 89, 88, 87, 86, 85, 84, 83, 82, 81, 80, 79, 78, 77, 76, 75, 74, 73, 72, 71, 70, 69, 68, 67, 66, 65, 64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50

The project site contains an overview how well these versions were compressed.
Other interesting projects are AngularJS, BackboneJS, Bootstrap, D3, Dojo, Ember, jQuery, Knockout, lodash, React, Socket.IO, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:

Size	Improvement	Parameters	Found
114483 bytes	-4 bytes	zopfli --i1000000 --mls8192 --bsr21 --lazy --ohh	May 24, 2016 @ 09:54
114487 bytes	-6 bytes	zopfli --i100000 --mls8192 --bsr21 --lazy --ohh	May 21, 2016 @ 04:09
114493 bytes	-14 bytes	zopfli --i10000 --mls8192 --bsr21 --lazy --ohh	May 21, 2016 @ 01:26
114507 bytes	-17 bytes	zopfli --i1000 --mls8192 --bsr21 --lazy --ohh	May 20, 2016 @ 23:05
114524 bytes	–	zopfli --i100 --mls8192 --bsr21 --lazy --ohh	May 20, 2016 @ 22:51

If there are multiple parameter sets yielding the same compressed size, only the first one found is shown.

Most recent activity on July 20, 2020 @ 12:51.

Heatmaps

This Zopfli heatmap visualizes how compression changes when modifying the --bsr and --mls parameter.
Cell's contents is the best filesize achieved (in bytes, hover with mouse over cells to see number of iterations).

Good parameters are green, bad are red. The best and worst are bold as well.
The brightness of the blue background color indicates how many iterations were processed:
10,000 or 1,000,000.

bsr \ mls	2	4	8	16	32	64	128	256	512	1024	2048	4096	8192	16384	32768
bsr \ mls	2	4	8	16	32	64	128	256	512	1024	2048	4096	8192	16384	32768
2	114668	114668	114669	114670	114670	114641	114664	114629	114771	114626	114656	114631	114612	114650	114731
4	114557	114547	114597	114566	114596	114545	114578	114568	114579	114578	114572	114559	114562	114560	114596
6	114550	114554	114537	114686	114646	114685	114679	114551	114667	114583	114555	114532	114554	114560	114558
7	114545	114572	114589	114540	114537	114547	114536	114504	114537	114563	114532	114530	114543	114543	114536
8	114548	114546	114551	114548	114544	114545	114543	114544	114554	114549	114536	114544	114539	114555	114572
9	114656	114658	114655	114669	114650	114665	114666	114643	114650	114649	114542	114542	114536	114591	114568
10	114546	114566	114665	114660	114661	114665	114667	114672	114642	114550	114555	114538	114533	114538	114587
11	114553	114552	114552	114652	114662	114648	114668	114551	114534	114551	114543	114545	114524	114555	114580
12	114563	114564	114566	114653	114635	114542	114666	114552	114546	114533	114535	114537	114540	114535	114577
13	114541	114558	114537	114535	114556	114554	114546	114534	114545	114586	114541	114532	114540	114545	114577
14	114542	114548	114546	114543	114538	114546	114540	114550	114541	114553	114558	114532	114536	114539	114533
15	114545	114548	114546	114530	114548	114547	114542	114516	114530	114548	114546	114526	114554	114543	114530
16	114542	114547	114541	114534	114574	114569	114569	114540	114534	114552	114545	114527	114520	114560	114592
17	114550	114552	114544	114543	114533	114556	114554	114565	114531	114530	114538	114534	114533	114551	114572
18	114558	114550	114551	114531	114543	114542	114556	114515	114503	114551	114541	114532	114538	114542	114572
19	114537	114547	114547	114530	114535	114538	114527	114540	114535	114535	114535	114552	114542	114566	114580
20	114542	114540	114539	114653	114543	114667	114668	114546	114547	114544	114544	114538	114533	114539	114576
21	114544	114537	114656	114658	114655	114666	114668	114499	114533	114546	114535	114530	114483	114544	114559
22	114553	114551	114658	114653	114645	114663	114663	114533	114644	114642	114544	114528	114542	114552	114538
23	114543	114549	114550	114652	114656	114663	114662	114545	114555	114548	114541	114527	114537	114550	114559
25	114548	114544	114542	114525	114651	114553	114542	114546	114526	114530	114544	114519	114522	114539	114574
30	114527	114538	114533	114530	114536	114546	114540	114499	114531	114549	114543	114530	114540	114537	114573
40	114544	114543	114548	114527	114538	114546	114544	114532	114519	114523	114529	114536	114541	114557	114570

Due to the Monte Carlo design of my search algorithm, not all parameters have reached the same number of iterations yet:

Iterations	Min. Bytes	Reduction	Coverage
100	114524 bytes	–	100%
1,000	114507 bytes	-17 bytes	100%
10,000	114493 bytes	-14 bytes	100%
100,000	114487 bytes	-6 bytes	0.29%
1,000,000	114483 bytes	-4 bytes	0.29%
10,000,000	–	–	–

KZIP has far less options available for tuning/optimization. I only played around with the number of blocks (parameter -n):

Blocks	Min. Bytes	Compared To Best Zopfli	Compared To Best KZIP
(any)	114510 bytes	+27 bytes (+0.02%)	–
1	115106 bytes	+623 bytes (+0.54%)	+596 bytes
2	115095 bytes	+612 bytes (+0.53%)	+585 bytes
3	114954 bytes	+471 bytes (+0.41%)	+444 bytes
4	114793 bytes	+310 bytes (+0.27%)	+283 bytes
5	114754 bytes	+271 bytes (+0.24%)	+244 bytes
6	114769 bytes	+286 bytes (+0.25%)	+259 bytes
7	114631 bytes	+148 bytes (+0.13%)	+121 bytes
8	114578 bytes	+95 bytes (+0.08%)	+68 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
However, support for Brotli is constantly growing - but your browser doesn't support it.

Algorithm	Program	Parameters	Size	Compared To Best Zopfli
ZPAQ (Wikipedia)	zpaq	zpaq -method 69	77952 bytes	-36531 bytes (-31.91%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	89411 bytes	-25072 bytes (-21.90%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	94268 bytes	-20215 bytes (-17.66%)
Brotli (Wikipedia)	brotli	brotli -q 11	99630 bytes	-14853 bytes (-12.97%)
LZMA2 (Wikipedia)	xz	xz -9	100428 bytes	-14055 bytes (-12.28%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	103603 bytes	-10880 bytes (-9.50%)
Zstandard (Wikipedia)	zstd	zstd -19	105963 bytes	-8520 bytes (-7.44%)

Detailled Analysis

I wrote a DEFLATE decoder in Javascript. Click the button below to start a client-side analysis of the smallest gzipped files (may take a second):

Load and Parse Data

Notes: pigz is a fast open source multi-threaded implementation of gzip written by one of the original authors of gzip.
However, when using compression level 11, pigz actually switches to the slower Zopfli algorithm and isn't multi-threaded anymore.
KrzyMOD's extensions to Zopfli offer the highest level of configuration and is therefore used for my brute-force search.
Ken Silverman wrote the closed-source KZIP compression program and Jonathon Fowler ported it to Linux.
Defluff was created by Joachim Henke; DeflOpt is a tool by Ben Jos Walbeehm.

website made by Stephan Brumme in 2015 and still improving in 2024.
all timestamps are displayed in central european time. see my changelog.
no flash, not even images or external css files - and everything squeezed into a single html file.
which was handsomely compressed before releasing it into the wild internet - obviously.

please visit my homepage and my blog, too.
email: minime (at) stephan-brumme.com

All trademarks are property of their respective owners. You know, the boring legal stuff.