ThreeJS 104 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1150054 bytes (1,123.1k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 571560 bytes (558.2k, 50%).

After GZIP compression these minified files vary in size:

unpkg	177076 bytes (172.9k)	CDN
cdnjs	143964 bytes (140.6k)	CDN
gzip -6 (default)	142393 bytes (139.1k)	local copy
jsdelivr	142311 bytes (139.0k)	CDN
gzip -9	141840 bytes (138.5k)	local copy
libdeflate -12	136982 bytes (133.8k)	local copy
7zip -mx=9 -tgzip	136966 bytes (133.8k)	local copy
zultra	136815 bytes (133.6k)	local copy
kzip -s0 -rn -b0	136529 bytes (133.3k)	local copy
pigz -11 -n	136514 bytes (133.3k)	local copy
Zopfli	136436 bytes (133.2k)	local copy
Zopfli (defluff)	136433 bytes (133.2k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r104.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 104 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 5875 bytes by using my ThreeJS 104 Zopfli version instead of the best available CDN (4.31% smaller than jsdelivr, 136436 vs. 142311 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 --mls4096 --bsr20 --lazy --ohh

(found May 1, 2019)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4096	--mls4096
block splitting recursion	20	--bsr20
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 3 more bytes (136433 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/r104/build/three.min.js --location | md5sum
d9f7c8e2c798bfbcd1f1ecd6a1ef6ef0 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r104.min.zopfli.js.gz | md5sum
d9f7c8e2c798bfbcd1f1ecd6a1ef6ef0 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r104/build/three.min.js --location | sha1sum
573aaa24ff3a6e98889c38bd64362a188f00e517 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r104.min.zopfli.js.gz | sha1sum
573aaa24ff3a6e98889c38bd64362a188f00e517 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
unpkg	177076 bytes	d9f7c8e2c798bfbcd1f1ecd6a1ef6ef0	(invalid)
cdnjs	143964 bytes	d9f7c8e2c798bfbcd1f1ecd6a1ef6ef0	(invalid)
jsdelivr	142311 bytes	d9f7c8e2c798bfbcd1f1ecd6a1ef6ef0	May 2, 2019 @ 08:29

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
136436 bytes	-3 bytes	zopfli --i1000000 --mls4096 --bsr20 --lazy --ohh	May 1, 2019 @ 07:58
136439 bytes	-1 byte	zopfli --i100000 --mls4096 --bsr20 --lazy --ohh	April 29, 2019 @ 21:27
136440 bytes	-5 bytes	zopfli --i100000 --mls2048 --bsr25 --lazy --ohh	April 29, 2019 @ 17:52
136445 bytes	-1 byte	zopfli --i10000 --mls4096 --bsr20 --lazy --ohh	April 29, 2019 @ 16:24
136446 bytes	-1 byte	zopfli --i10000 --mls2048 --bsr15 --lazy --ohh	April 29, 2019 @ 14:46
136447 bytes	-7 bytes	zopfli --i10000 --mls2048 --bsr25 --lazy --ohh	April 29, 2019 @ 14:43
136454 bytes	-5 bytes	zopfli --i1000 --mls2048 --bsr25 --lazy --ohh	April 29, 2019 @ 12:42
136459 bytes	-3 bytes	zopfli --i1000 --mls2048 --bsr9 --lazy --ohh	April 29, 2019 @ 12:42
136462 bytes	-11 bytes	zopfli --i1000 --mls4096 --bsr20 --lazy --ohh	April 29, 2019 @ 12:42
136473 bytes	–	zopfli --i100 --mls2048 --bsr25 --lazy --ohh	April 29, 2019 @ 11:53

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 @ 12:50.

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, 100,000 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	136763	136764	136770	136781	136793	136741	136806	136747	136754	136779	136767	136609	136607	136589	136612
4	136770	136712	136689	136556	136766	136589	136764	136582	136603	136693	136759	136719	136689	136783	136683
6	136684	136683	136698	136703	136701	136707	136698	136737	136704	136721	136707	136678	136681	136680	136672
7	136694	136705	136692	136738	136734	136660	136762	136757	136647	136711	136453	136680	136614	136677	136610
8	136535	136532	136667	136528	136547	136668	136659	136659	136698	136807	136706	136516	136677	136659	136669
9	136527	136561	136690	136729	136751	136736	136711	136750	136460	136448	136446	136500	136675	136664	136674
10	136528	136527	136528	136527	136680	136655	136708	136514	136534	136652	136542	136653	136677	136660	136687
11	136531	136522	136695	136710	136723	136744	136653	136657	136703	136657	136515	136454	136679	136699	136618
12	136695	136692	136668	136692	136767	136636	136663	136725	136731	136663	136531	136621	136769	136653	136618
13	136685	136684	136681	136670	136674	136681	136662	136676	136696	136653	136447	136525	136618	136671	136635
14	136703	136692	136678	136713	136748	136732	136746	136768	136608	136651	136745	136506	136675	136676	136650
15	136687	136685	136512	136698	136696	136708	136712	136750	136534	136673	136446	136694	136657	136677	136623
16	136685	136717	136744	136746	136732	136760	136728	136730	136715	136663	136747	136625	136641	136712	136630
17	136525	136610	136525	136639	136723	136495	136712	136734	136599	136660	136701	136637	136628	136652	136621
18	136746	136723	136726	136728	136740	136749	136728	136769	136759	136651	136712	136708	136629	136656	136634
19	136714	136738	136723	136758	136749	136769	136721	136759	136704	136664	136469	136463	136627	136684	136639
20	136544	136687	136612	136734	136737	136702	136726	136754	136771	136649	136657	136436	136639	136507	136622
21	136547	136527	136718	136765	136715	136704	136717	136773	136769	136673	136658	136519	136619	136680	136615
22	136528	136527	136716	136759	136756	136726	136708	136766	136752	136656	136532	136530	136617	136678	136615
23	136697	136695	136718	136770	136732	136491	136644	136757	136745	136652	136463	136486	136674	136680	136621
25	136695	136694	136664	136760	136703	136654	136710	136655	136646	136660	136440	136528	136668	136659	136621
30	136600	136541	136697	136775	136704	136736	136700	136751	136710	136656	136452	136659	136479	136650	136633
40	136714	136618	136721	136766	136727	136722	136723	136755	136737	136460	136502	136519	136627	136656	136620

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	136473 bytes	–	100%
1,000	136454 bytes	-19 bytes	100%
10,000	136445 bytes	-9 bytes	100%
100,000	136439 bytes	-6 bytes	0.58%
1,000,000	136436 bytes	-3 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)	136529 bytes	+93 bytes (+0.07%)	–
1	137192 bytes	+756 bytes (+0.55%)	+663 bytes
2	137155 bytes	+719 bytes (+0.53%)	+626 bytes
3	136989 bytes	+553 bytes (+0.41%)	+460 bytes
4	136868 bytes	+432 bytes (+0.32%)	+339 bytes
5	136686 bytes	+250 bytes (+0.18%)	+157 bytes
6	136696 bytes	+260 bytes (+0.19%)	+167 bytes
7	136663 bytes	+227 bytes (+0.17%)	+134 bytes
8	136597 bytes	+161 bytes (+0.12%)	+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 - for example, your browser actually supports it !

Algorithm	Program	Parameters	Size	Compared To Best Zopfli
ZPAQ (Wikipedia)	zpaq	zpaq -method 69	91646 bytes	-44790 bytes (-32.83%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	105321 bytes	-31115 bytes (-22.81%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	109069 bytes	-27367 bytes (-20.06%)
Brotli (Wikipedia)	brotli	brotli -q 11	115815 bytes	-20621 bytes (-15.11%)
LZMA2 (Wikipedia)	xz	xz -9	116652 bytes	-19784 bytes (-14.50%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	121250 bytes	-15186 bytes (-11.13%)
Zstandard (Wikipedia)	zstd	zstd -19	122610 bytes	-13826 bytes (-10.13%)

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 2025.
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.