ThreeJS 88 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1059047 bytes (1,034.2k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 520390 bytes (508.2k, 49%).

After GZIP compression these minified files vary in size:

cdnjs	133085 bytes (130.0k)	CDN
unpkg	131850 bytes (128.8k)	CDN
jsdelivr	131700 bytes (128.6k)	CDN
gzip -6 (default)	131636 bytes (128.6k)	local copy
gzip -9	131181 bytes (128.1k)	local copy
libdeflate -12	126738 bytes (123.8k)	local copy
7zip -mx=9 -tgzip	126657 bytes (123.7k)	local copy
zultra	126598 bytes (123.6k)	local copy
pigz -11 -n	126312 bytes (123.4k)	local copy
kzip -s0 -rn -b0	126293 bytes (123.3k)	local copy
Zopfli	126236 bytes (123.3k)	local copy
Zopfli (defluff)	126231 bytes (123.3k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r88.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 88 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 5464 bytes by using my ThreeJS 88 Zopfli version instead of the best available CDN (4.33% smaller than jsdelivr, 126236 vs. 131700 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 --mls64 --bsr7 --lazy --ohh

(found November 8, 2017)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	64	--mls64
block splitting recursion	7	--bsr7
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 5 more bytes (126231 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/r88/build/three.min.js --location | md5sum
bddd3c70f6e94b2c969bb1e7f723bea4 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r88.min.zopfli.js.gz | md5sum
bddd3c70f6e94b2c969bb1e7f723bea4 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r88/build/three.min.js --location | sha1sum
e9596ca52ee5e43650e06e70374387348d3e0210 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r88.min.zopfli.js.gz | sha1sum
e9596ca52ee5e43650e06e70374387348d3e0210 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
cdnjs	133085 bytes	bddd3c70f6e94b2c969bb1e7f723bea4	(invalid)
unpkg	131850 bytes	bddd3c70f6e94b2c969bb1e7f723bea4	(invalid)
jsdelivr	131700 bytes	bddd3c70f6e94b2c969bb1e7f723bea4	November 9, 2017 @ 11:40

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
126236 bytes	-5 bytes	zopfli --i1000000 --mls64 --bsr7 --lazy --ohh	November 8, 2017 @ 23:04
126241 bytes	-9 bytes	zopfli --i100000 --mls64 --bsr7 --lazy --ohh	November 7, 2017 @ 08:46
126250 bytes	-17 bytes	zopfli --i10000 --mls64 --bsr7 --lazy --ohh	November 7, 2017 @ 00:15
126267 bytes	-29 bytes	zopfli --i1000 --mls64 --bsr7 --lazy --ohh	November 6, 2017 @ 14:22
126296 bytes	–	zopfli --i100 --mls64 --bsr7 --lazy --ohh	November 6, 2017 @ 13:10

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	126442	126410	126389	126396	126340	126323	126333	126310	126340	126405	126413	126413	126363	126414	126371
4	126388	126390	126396	126371	126392	126327	126366	126379	126348	126350	126375	126327	126298	126358	126344
6	126397	126403	126402	126406	126317	126318	126338	126339	126336	126360	126341	126330	126350	126341	126357
7	126400	126393	126421	126335	126368	126236	126389	126379	126343	126359	126345	126327	126322	126333	126344
8	126399	126404	126408	126405	126406	126345	126347	126341	126339	126373	126354	126353	126340	126421	126344
9	126394	126389	126408	126402	126405	126321	126390	126323	126329	126345	126346	126340	126344	126341	126369
10	126398	126396	126399	126394	126325	126324	126394	126324	126331	126342	126345	126341	126345	126339	126350
11	126397	126397	126404	126396	126395	126322	126392	126325	126336	126344	126349	126346	126334	126359	126356
12	126335	126392	126392	126403	126337	126324	126333	126336	126349	126340	126346	126341	126321	126330	126351
13	126407	126338	126425	126390	126389	126293	126317	126338	126337	126358	126342	126342	126321	126343	126349
14	126406	126404	126345	126391	126397	126391	126388	126344	126343	126344	126341	126347	126331	126342	126342
15	126403	126391	126401	126391	126384	126268	126397	126326	126322	126342	126349	126346	126337	126325	126341
16	126389	126395	126387	126394	126396	126314	126401	126324	126324	126343	126349	126399	126323	126329	126343
17	126407	126386	126352	126390	126393	126404	126401	126398	126330	126345	126339	126396	126298	126331	126352
18	126391	126404	126393	126394	126391	126391	126330	126409	126327	126354	126346	126394	126325	126329	126347
19	126394	126338	126391	126396	126387	126345	126332	126393	126340	126342	126342	126346	126340	126323	126377
20	126397	126403	126409	126401	126401	126402	126399	126389	126347	126342	126347	126342	126330	126365	126340
21	126396	126392	126392	126401	126327	126322	126388	126313	126330	126399	126358	126346	126334	126331	126373
22	126399	126397	126396	126398	126331	126325	126389	126328	126332	126342	126345	126344	126323	126327	126339
23	126401	126404	126352	126400	126404	126308	126388	126399	126348	126347	126341	126345	126325	126343	126333
25	126404	126397	126341	126325	126394	126326	126336	126328	126337	126338	126348	126340	126326	126363	126352
30	126396	126405	126347	126394	126405	126396	126387	126339	126329	126346	126350	126345	126349	126353	126354
40	126334	126407	126328	126394	126336	126319	126335	126330	126346	126342	126338	126337	126324	126339	126342

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	126296 bytes	–	100%
1,000	126267 bytes	-29 bytes	100%
10,000	126250 bytes	-17 bytes	100%
100,000	126241 bytes	-9 bytes	0.58%
1,000,000	126236 bytes	-5 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)	126293 bytes	+57 bytes (+0.05%)	–
1	126896 bytes	+660 bytes (+0.52%)	+603 bytes
2	126874 bytes	+638 bytes (+0.51%)	+581 bytes
3	126635 bytes	+399 bytes (+0.32%)	+342 bytes
4	126560 bytes	+324 bytes (+0.26%)	+267 bytes
5	126430 bytes	+194 bytes (+0.15%)	+137 bytes
6	126472 bytes	+236 bytes (+0.19%)	+179 bytes
7	126429 bytes	+193 bytes (+0.15%)	+136 bytes
8	126328 bytes	+92 bytes (+0.07%)	+35 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	85315 bytes	-40921 bytes (-32.42%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	97993 bytes	-28243 bytes (-22.37%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	104358 bytes	-21878 bytes (-17.33%)
Brotli (Wikipedia)	brotli	brotli -q 11	107693 bytes	-18543 bytes (-14.69%)
LZMA2 (Wikipedia)	xz	xz -9	108424 bytes	-17812 bytes (-14.11%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	112865 bytes	-13371 bytes (-10.59%)
Zstandard (Wikipedia)	zstd	zstd -19	114613 bytes	-11623 bytes (-9.21%)

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.