ThreeJS 100 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1113181 bytes (1,087.1k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 552149 bytes (539.2k, 50%).

After GZIP compression these minified files vary in size:

cdnjs	139018 bytes (135.8k)	CDN
unpkg	137868 bytes (134.6k)	CDN
gzip -6 (default)	137604 bytes (134.4k)	local copy
jsdelivr	137460 bytes (134.2k)	CDN
gzip -9	137097 bytes (133.9k)	local copy
7zip -mx=9 -tgzip	132463 bytes (129.4k)	local copy
libdeflate -12	132400 bytes (129.3k)	local copy
zultra	132274 bytes (129.2k)	local copy
pigz -11 -n	132056 bytes (129.0k)	local copy
kzip -s0 -rn -b0	132007 bytes (128.9k)	local copy
Zopfli	131895 bytes (128.8k)	local copy
Zopfli (defluff)	131892 bytes (128.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r100.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 100 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 5565 bytes by using my ThreeJS 100 Zopfli version instead of the best available CDN (4.22% smaller than jsdelivr, 131895 vs. 137460 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 --bsr23 --lazy --ohh

(found January 8, 2019)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4096	--mls4096
block splitting recursion	23	--bsr23
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 (131892 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/r100/build/three.min.js --location | md5sum
54ea4c40b4ce924f260f543b3c9fb06e -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r100.min.zopfli.js.gz | md5sum
54ea4c40b4ce924f260f543b3c9fb06e -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r100/build/three.min.js --location | sha1sum
c74fd9cd9d18e4435b683812e1b54f00b5002b4d -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r100.min.zopfli.js.gz | sha1sum
c74fd9cd9d18e4435b683812e1b54f00b5002b4d -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
cdnjs	139018 bytes	54ea4c40b4ce924f260f543b3c9fb06e	(invalid)
unpkg	137868 bytes	54ea4c40b4ce924f260f543b3c9fb06e	(invalid)
jsdelivr	137460 bytes	54ea4c40b4ce924f260f543b3c9fb06e	January 4, 2019 @ 15:46

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
131895 bytes	-3 bytes	zopfli --i1000000 --mls4096 --bsr23 --lazy --ohh	January 8, 2019 @ 07:14
131898 bytes	-3 bytes	zopfli --i100000 --mls4096 --bsr30 --lazy --ohh	January 4, 2019 @ 18:21
131901 bytes	-2 bytes	zopfli --i10000 --mls4096 --bsr23 --lazy --ohh	January 4, 2019 @ 15:50
131903 bytes	-7 bytes	zopfli --i10000 --mls4096 --bsr30 --lazy --ohh	January 4, 2019 @ 14:29
131910 bytes	-21 bytes	zopfli --i1000 --mls4096 --bsr30 --lazy --ohh	January 4, 2019 @ 09:50
131931 bytes	–	zopfli --i100 --mls4096 --bsr30 --lazy --ohh	January 3, 2019 @ 16:50

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	132120	132156	132145	132145	132156	132126	132146	131998	132152	132152	132152	132144	132171	132153	132135
4	132176	132171	132146	132152	132157	132217	132152	132045	132200	132199	132195	132190	132146	132175	132105
6	132233	132236	132061	132158	132126	132189	132052	131978	132062	132228	132030	131971	132177	131980	132120
7	132023	132189	132152	132155	132184	132152	132202	132042	132017	132211	132019	132019	132029	132011	132139
8	132150	132169	132159	132157	132185	132144	132183	131990	132019	132200	132032	132182	132172	132145	132137
9	132126	132167	132158	132152	132136	132209	132143	132043	132128	132151	132084	131939	132207	132165	132132
10	132187	132200	132187	132026	132133	132133	132134	132213	132103	132103	131916	131924	132172	132154	132127
11	132166	132147	132163	132161	132138	132139	132163	132188	132160	132139	131968	131964	132161	132117	132131
12	132190	132153	132171	132171	131997	132157	132149	131969	132181	132154	132013	132116	132176	132132	132139
13	132152	132150	132149	132145	132154	132021	132177	132082	132131	132173	132043	131959	132177	131972	132176
14	132158	132169	132185	132152	132151	132154	132134	132061	131974	132181	132215	132169	132164	132160	132133
15	132185	132149	132177	132194	132221	132169	132188	131988	132150	132200	132149	131960	132181	132163	132100
16	132194	132173	132162	132156	132168	132152	132139	132035	132161	132174	131966	132140	132184	131999	132100
17	132171	132177	132170	132162	132173	132164	132193	132220	132151	132174	132147	131967	132142	132141	132121
18	132212	132170	132167	132170	132148	132155	132156	132029	132151	132175	132150	132142	132143	132141	132091
19	132169	132167	132176	132161	132029	132175	132183	132051	132040	132173	132215	132143	132145	132143	132072
20	132209	132197	132174	132166	132188	131998	132141	132002	132150	132170	132128	132142	132144	132160	132108
21	132178	132171	132165	132167	132175	132155	132167	132018	131972	132143	132001	132149	132141	131972	132090
22	132182	132157	132163	132165	132180	132192	132184	132032	131970	132172	132132	131932	131959	132116	132089
23	132167	132171	132161	132162	132033	132181	132185	132084	132154	132171	131925	131895	132145	131975	132130
25	132185	132174	132172	132165	132199	132165	132140	132012	131968	132174	131956	132149	131958	132160	132128
30	132156	132173	132176	132162	132175	132161	132039	132001	132152	132097	131914	131895	132169	132126	132091
40	132156	132149	132175	132162	132157	132165	132182	132039	131959	132181	131962	131961	132146	132118	132088

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	131931 bytes	–	100%
1,000	131910 bytes	-21 bytes	100%
10,000	131901 bytes	-9 bytes	100%
100,000	131898 bytes	-3 bytes	1.16%
1,000,000	131895 bytes	-3 bytes	0.58%
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)	132007 bytes	+112 bytes (+0.08%)	–
1	132675 bytes	+780 bytes (+0.59%)	+668 bytes
2	132607 bytes	+712 bytes (+0.54%)	+600 bytes
3	132449 bytes	+554 bytes (+0.42%)	+442 bytes
4	132355 bytes	+460 bytes (+0.35%)	+348 bytes
5	132154 bytes	+259 bytes (+0.20%)	+147 bytes
6	132138 bytes	+243 bytes (+0.18%)	+131 bytes
7	132104 bytes	+209 bytes (+0.16%)	+97 bytes
8	132081 bytes	+186 bytes (+0.14%)	+74 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	88848 bytes	-43047 bytes (-32.64%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	102295 bytes	-29600 bytes (-22.44%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	105882 bytes	-26013 bytes (-19.72%)
Brotli (Wikipedia)	brotli	brotli -q 11	112245 bytes	-19650 bytes (-14.90%)
LZMA2 (Wikipedia)	xz	xz -9	113056 bytes	-18839 bytes (-14.28%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	117657 bytes	-14238 bytes (-10.79%)
Zstandard (Wikipedia)	zstd	zstd -19	118919 bytes	-12976 bytes (-9.84%)

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.