ThreeJS 92 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1078204 bytes (1,052.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 533939 bytes (521.4k, 50%).

After GZIP compression these minified files vary in size:

cdnjs	134761 bytes (131.6k)	CDN
unpkg	134761 bytes (131.6k)	CDN
gzip -6 (default)	134482 bytes (131.3k)	local copy
jsdelivr	134405 bytes (131.3k)	CDN
gzip -9	134058 bytes (130.9k)	local copy
libdeflate -12	129482 bytes (126.4k)	local copy
7zip -mx=9 -tgzip	129480 bytes (126.4k)	local copy
zultra	129206 bytes (126.2k)	local copy
kzip -s0 -rn -b8	129132 bytes (126.1k)	local copy
pigz -11 -n	129059 bytes (126.0k)	local copy
Zopfli	128960 bytes (125.9k)	local copy
Zopfli (defluff)	128953 bytes (125.9k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r92.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 92 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 5445 bytes by using my ThreeJS 92 Zopfli version instead of the best available CDN (4.22% smaller than jsdelivr, 128960 vs. 134405 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 --bsr15 --lazy --ohh

(found April 27, 2018)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	8192	--mls8192
block splitting recursion	15	--bsr15
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 7 more bytes (128953 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/r92/build/three.min.js --location | md5sum
c10b0dcd6981ae16bc72cf1d6c32a8da -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r92.min.zopfli.js.gz | md5sum
c10b0dcd6981ae16bc72cf1d6c32a8da -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r92/build/three.min.js --location | sha1sum
d27c1241a0aa68c1cd4c58d63e64bc8cf2eafb69 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r92.min.zopfli.js.gz | sha1sum
d27c1241a0aa68c1cd4c58d63e64bc8cf2eafb69 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
cdnjs	134761 bytes	c10b0dcd6981ae16bc72cf1d6c32a8da	(invalid)
unpkg	134761 bytes	c10b0dcd6981ae16bc72cf1d6c32a8da	(invalid)
jsdelivr	134405 bytes	c10b0dcd6981ae16bc72cf1d6c32a8da	April 23, 2018 @ 08:55

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
128960 bytes	-2 bytes	zopfli --i1000000 --mls8192 --bsr15 --lazy --ohh	April 27, 2018 @ 06:13
128962 bytes	-6 bytes	zopfli --i100000 --mls8192 --bsr15 --lazy --ohh	April 25, 2018 @ 17:05
128968 bytes	-4 bytes	zopfli --i10000 --mls8192 --bsr15 --lazy --ohh	April 24, 2018 @ 00:17
128972 bytes	-8 bytes	zopfli --i10000 --mls2048 --bsr11 --lazy --ohh	April 23, 2018 @ 22:50
128980 bytes	-20 bytes	zopfli --i1000 --mls8192 --bsr15 --lazy --ohh	April 23, 2018 @ 09:59
129000 bytes	–	zopfli --i100 --mls8192 --bsr15 --lazy --ohh	April 23, 2018 @ 09:25

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 @ 12:52.

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	129099	129092	129235	129094	129243	129124	129226	129216	129119	129223	129145	129137	129148	129073	129136
4	129231	129248	129255	129245	129272	129267	129093	129097	129095	129257	129189	129204	129115	129118	129253
6	129215	129194	129128	129186	129130	129116	129115	129237	129244	129230	129194	129194	129075	129261	129216
7	129060	129178	129197	129250	129225	129179	129261	129215	129331	129180	129222	129200	129083	129251	128995
8	129081	129201	129219	129202	129186	129181	129060	129227	129207	129218	129223	129086	129229	129104	129194
9	129057	129054	129188	129219	129263	129172	129217	129217	129251	129257	129221	129233	129067	129252	129213
10	129220	129204	129200	129232	129225	129090	129235	129222	129229	129193	129090	129060	129086	129246	129179
11	129051	129052	129054	129246	129205	129201	129253	129032	129215	129030	128965	128981	129086	129241	129174
12	129215	129030	129214	129209	129180	129055	129177	129222	129203	129255	129214	129212	129228	129247	129182
13	129212	129038	129243	129211	129221	129180	129230	129236	129212	129173	129048	128975	129075	129243	129177
14	129078	129055	129195	129206	129226	129219	129247	129201	129191	129256	129247	129086	129076	129249	129172
15	129077	129052	129211	129217	129196	129222	129060	129052	129050	129057	129053	128981	128960	129252	129178
16	129058	129063	129198	129213	129189	129183	129207	129202	129208	129262	129215	129066	129071	129246	129198
17	129062	129189	129221	129176	129214	129214	129199	129212	129202	129035	129239	129063	129071	129098	129162
18	129052	129205	129214	129201	129191	129201	129209	129228	129202	129226	129214	129060	129074	129244	129154
19	129054	129056	129190	129199	129206	129204	129196	129233	129253	129260	129241	129253	129071	129248	129143
20	129223	129185	129053	129051	129205	129239	129247	129209	129230	129059	129225	128982	129251	128976	129154
21	129055	129061	129056	129198	129255	129175	129238	129203	129216	129044	129243	128978	129071	129256	129203
22	129076	129032	129200	129192	129200	129206	129254	129202	129175	129259	129238	128983	129078	129250	129145
23	129205	129148	129197	129201	129208	129217	129232	129227	129207	129034	129014	128984	129062	129257	129144
25	129037	129034	129035	129038	129199	129148	129221	129229	129173	129045	129155	128979	129253	129249	129188
30	129052	129033	129192	129210	129194	129217	129225	129209	129206	129180	129239	128974	129260	129258	129186
40	129064	129034	129208	129207	129218	129229	129227	129234	129185	129179	129240	129179	129073	129246	129180

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	129000 bytes	–	100%
1,000	128980 bytes	-20 bytes	100%
10,000	128968 bytes	-12 bytes	100%
100,000	128962 bytes	-6 bytes	0.58%
1,000,000	128960 bytes	-2 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)	129162 bytes	+202 bytes (+0.16%)	+30 bytes
1	129712 bytes	+752 bytes (+0.58%)	+580 bytes
2	129714 bytes	+754 bytes (+0.58%)	+582 bytes
3	129529 bytes	+569 bytes (+0.44%)	+397 bytes
4	129448 bytes	+488 bytes (+0.38%)	+316 bytes
5	129305 bytes	+345 bytes (+0.27%)	+173 bytes
6	129247 bytes	+287 bytes (+0.22%)	+115 bytes
7	129161 bytes	+201 bytes (+0.16%)	+29 bytes
8	129132 bytes	+172 bytes (+0.13%)	–

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	86677 bytes	-42283 bytes (-32.79%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	99812 bytes	-29148 bytes (-22.60%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	103629 bytes	-25331 bytes (-19.64%)
Brotli (Wikipedia)	brotli	brotli -q 11	109583 bytes	-19377 bytes (-15.03%)
LZMA2 (Wikipedia)	xz	xz -9	110416 bytes	-18544 bytes (-14.38%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	114732 bytes	-14228 bytes (-11.03%)
Zstandard (Wikipedia)	zstd	zstd -19	116913 bytes	-12047 bytes (-9.34%)

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.