ThreeJS 101 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1123038 bytes (1,096.7k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 557405 bytes (544.3k, 50%).

After GZIP compression these minified files vary in size:

unpkg	172440 bytes (168.4k)	CDN
cdnjs	140304 bytes (137.0k)	CDN
gzip -6 (default)	138820 bytes (135.6k)	local copy
jsdelivr	138675 bytes (135.4k)	CDN
gzip -9	138304 bytes (135.1k)	local copy
libdeflate -12	133517 bytes (130.4k)	local copy
7zip -mx=9 -tgzip	133505 bytes (130.4k)	local copy
zultra	133374 bytes (130.2k)	local copy
pigz -11 -n	133157 bytes (130.0k)	local copy
kzip -s0 -rn -b0	133147 bytes (130.0k)	local copy
Zopfli	133016 bytes (129.9k)	local copy
Zopfli (defluff)	133012 bytes (129.9k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r101.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 101 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 5659 bytes by using my ThreeJS 101 Zopfli version instead of the best available CDN (4.25% smaller than jsdelivr, 133016 vs. 138675 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 --bsr30 --lazy --ohh

(found February 3, 2019)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4096	--mls4096
block splitting recursion	30	--bsr30
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 4 more bytes (133012 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/r101/build/three.min.js --location | md5sum
6351be42f811a3931c6002b296e1f038 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r101.min.zopfli.js.gz | md5sum
6351be42f811a3931c6002b296e1f038 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r101/build/three.min.js --location | sha1sum
1046f1825f5a43b5048d5542102d7365d076acf1 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r101.min.zopfli.js.gz | sha1sum
1046f1825f5a43b5048d5542102d7365d076acf1 -

These CDNs send you the original file:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
cdnjs	140304 bytes	6351be42f811a3931c6002b296e1f038	(invalid)

And some CDNs send you a different file:

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
unpkg	172440 bytes	147b1e08db2a8015fa94e4bfc6ef6902	< // threejs.org/license	(invalid)
jsdelivr	138675 bytes	147b1e08db2a8015fa94e4bfc6ef6902	< // threejs.org/license	February 1, 2019 @ 10:47

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
133016 bytes	-6 bytes	zopfli --i1000000 --mls4096 --bsr30 --lazy --ohh	February 3, 2019 @ 15:11
133022 bytes	-7 bytes	zopfli --i100000 --mls4096 --bsr30 --lazy --ohh	February 1, 2019 @ 19:28
133029 bytes	-1 byte	zopfli --i100000 --mls4096 --bsr13 --lazy --ohh	February 1, 2019 @ 15:35
133030 bytes	-7 bytes	zopfli --i10000 --mls4096 --bsr30 --lazy --ohh	February 1, 2019 @ 13:43
133037 bytes	-9 bytes	zopfli --i10000 --mls4096 --bsr13 --lazy --ohh	February 1, 2019 @ 12:08
133046 bytes	-12 bytes	zopfli --i1000 --mls4096 --bsr13 --lazy --ohh	February 1, 2019 @ 11:22
133058 bytes	-3 bytes	zopfli --i1000 --mls8192 --bsr10 --lazy --ohh	February 1, 2019 @ 11:21
133061 bytes	-11 bytes	zopfli --i1000 --mls4096 --bsr19 --lazy --ohh	February 1, 2019 @ 11:21
133072 bytes	–	zopfli --i100 --mls4096 --bsr13 --lazy --ohh	February 1, 2019 @ 10:52

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, 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	133278	133277	133232	133240	133288	133287	133281	133364	133288	133280	133291	133267	133277	133257	133260
4	133192	133142	133134	133365	133345	133364	133245	133144	133231	133355	133347	133338	133252	133307	133136
6	133078	133097	133313	133128	133340	133323	133323	133097	133163	133363	133220	133089	133383	133389	133289
7	133102	133150	133286	133310	133327	133110	133303	133118	133329	133168	133314	133245	133122	133289	133280
8	133115	133324	133307	133289	133295	133296	133282	133094	133290	133127	133043	133251	133109	133284	133228
9	133328	133306	133134	133306	133323	133308	133237	133193	133164	133304	133293	133056	133284	133305	133305
10	133282	133285	133288	133291	133319	133289	133286	133111	133109	133107	133064	133075	133045	133319	133268
11	133289	133289	133097	133090	133295	133294	133284	133343	133332	133315	133291	133106	133124	133291	133283
12	133302	133292	133292	133315	133304	133076	133295	133169	133277	133308	133198	133248	133290	133282	133293
13	133286	133292	133286	133280	133285	133091	133281	133143	133290	133301	133051	133029	133289	133278	133295
14	133295	133296	133312	133331	133339	133077	133316	133170	133080	133312	133285	133111	133314	133280	133281
15	133253	133254	133281	133123	133288	133311	133246	133348	133143	133165	133073	133044	133058	133304	133275
16	133292	133300	133290	133316	133309	133285	133104	133106	133330	133305	133286	133284	133310	133297	133288
17	133324	133133	133328	133312	133305	133298	133341	133159	133162	133256	133139	133097	133104	133285	133264
18	133132	133310	133322	133304	133309	133317	133336	133168	133120	133334	133073	133067	133286	133284	133253
19	133310	133289	133336	133305	133294	133306	133283	133348	133164	133303	133111	133045	133100	133279	133291
20	133323	133290	133291	133311	133295	133304	133090	133108	133131	133307	133288	133294	133286	133292	133277
21	133276	133285	133283	133142	133279	133278	133300	133341	133166	133304	133288	133048	133118	133281	133289
22	133292	133294	133278	133284	133283	133307	133278	133145	133164	133305	133296	133071	133098	133288	133278
23	133286	133292	133287	133117	133284	133300	133282	133132	133119	133256	133072	133075	133098	133283	133254
25	133301	133297	133282	133136	133296	133302	133251	133333	133282	133249	133065	133060	133291	133294	133275
30	133297	133295	133281	133293	133298	133064	133293	133330	133129	133253	133077	133016	133291	133311	133243
40	133300	133293	133285	133303	133294	133290	133097	133329	133136	133304	133282	133098	133043	133108	133267

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	133072 bytes	–	100%
1,000	133046 bytes	-26 bytes	100%
10,000	133030 bytes	-16 bytes	100%
100,000	133022 bytes	-8 bytes	0.58%
1,000,000	133016 bytes	-6 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)	133147 bytes	+131 bytes (+0.10%)	–
1	133774 bytes	+758 bytes (+0.57%)	+627 bytes
2	133736 bytes	+720 bytes (+0.54%)	+589 bytes
3	133613 bytes	+597 bytes (+0.45%)	+466 bytes
4	133458 bytes	+442 bytes (+0.33%)	+311 bytes
5	133306 bytes	+290 bytes (+0.22%)	+159 bytes
6	133257 bytes	+241 bytes (+0.18%)	+110 bytes
7	133269 bytes	+253 bytes (+0.19%)	+122 bytes
8	133249 bytes	+233 bytes (+0.18%)	+102 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	89611 bytes	-43405 bytes (-32.63%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	103084 bytes	-29932 bytes (-22.50%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	106762 bytes	-26254 bytes (-19.74%)
Brotli (Wikipedia)	brotli	brotli -q 11	113240 bytes	-19776 bytes (-14.87%)
LZMA2 (Wikipedia)	xz	xz -9	113996 bytes	-19020 bytes (-14.30%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	118687 bytes	-14329 bytes (-10.77%)
Zstandard (Wikipedia)	zstd	zstd -19	119916 bytes	-13100 bytes (-9.85%)

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

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