ThreeJS 94 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1103485 bytes (1,077.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 545457 bytes (532.7k, 49%).

After GZIP compression these minified files vary in size:

cdnjs	139173 bytes (135.9k)	CDN
unpkg	138014 bytes (134.8k)	CDN
gzip -6 (default)	137639 bytes (134.4k)	local copy
jsdelivr	137546 bytes (134.3k)	CDN
gzip -9	137190 bytes (134.0k)	local copy
libdeflate -12	132588 bytes (129.5k)	local copy
7zip -mx=9 -tgzip	132508 bytes (129.4k)	local copy
zultra	132364 bytes (129.3k)	local copy
kzip -s0 -rn -b6	132219 bytes (129.1k)	local copy
pigz -11 -n	132193 bytes (129.1k)	local copy
Zopfli	132055 bytes (129.0k)	local copy
Zopfli (defluff)	132052 bytes (129.0k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r94.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 94 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 5491 bytes by using my ThreeJS 94 Zopfli version instead of the best available CDN (4.16% smaller than jsdelivr, 132055 vs. 137546 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 --bsr21 --lazy --ohh

(found June 30, 2018)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4096	--mls4096
block splitting recursion	21	--bsr21
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 (132052 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/r94/build/three.min.js --location | md5sum
dfe8385c1102682808e14b0a3a94e81d -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r94.min.zopfli.js.gz | md5sum
dfe8385c1102682808e14b0a3a94e81d -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r94/build/three.min.js --location | sha1sum
20b7e97ba490a42a4c3157e6c2a0a4c711b0f086 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r94.min.zopfli.js.gz | sha1sum
20b7e97ba490a42a4c3157e6c2a0a4c711b0f086 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
cdnjs	139173 bytes	dfe8385c1102682808e14b0a3a94e81d	(invalid)
unpkg	138014 bytes	dfe8385c1102682808e14b0a3a94e81d	(invalid)
jsdelivr	137546 bytes	dfe8385c1102682808e14b0a3a94e81d	June 28, 2018 @ 13:03

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
132055 bytes	-7 bytes	zopfli --i1000000 --mls4096 --bsr21 --lazy --ohh	June 30, 2018 @ 06:22
132062 bytes	-2 bytes	zopfli --i100000 --mls4096 --bsr21 --lazy --ohh	June 28, 2018 @ 19:46
132064 bytes	-4 bytes	zopfli --i100000 --mls16384 --bsr15 --lazy --ohh	June 28, 2018 @ 17:42
132068 bytes	-1 byte	zopfli --i10000 --mls4096 --bsr21 --lazy --ohh	June 28, 2018 @ 16:13
132069 bytes	-1 byte	zopfli --i10000 --mls16384 --bsr15 --lazy --ohh	June 28, 2018 @ 14:51
132070 bytes	-9 bytes	zopfli --i10000 --mls4096 --bsr22 --lazy --ohh	June 28, 2018 @ 13:49
132079 bytes	-2 bytes	zopfli --i1000 --mls16384 --bsr13 --lazy --ohh	June 28, 2018 @ 13:21
132081 bytes	-3 bytes	zopfli --i1000 --mls16384 --bsr15 --lazy --ohh	June 28, 2018 @ 13:21
132084 bytes	-2 bytes	zopfli --i1000 --mls4096 --bsr21 --lazy --ohh	June 28, 2018 @ 13:21
132086 bytes	-13 bytes	zopfli --i1000 --mls16384 --bsr17 --lazy --ohh	June 28, 2018 @ 13:21
132099 bytes	–	zopfli --i100 --mls4096 --bsr22 --lazy --ohh	June 28, 2018 @ 13:09

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 @ 12:56.

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	132317	132204	132201	132201	132185	132381	132340	132265	132342	132336	132248	132321	132125	132145	132234
4	132336	132322	132325	132347	132384	132333	132373	132374	132376	132300	132288	132367	132191	132188	132391
6	132317	132317	132158	132321	132361	132271	132371	132160	132305	132216	132269	132344	132325	132284	132368
7	132149	132302	132197	132305	132311	132304	132352	132318	132308	132171	132138	132137	132327	132324	132359
8	132142	132307	132148	132306	132433	132132	132321	132330	132327	132177	132346	132096	132187	132281	132120
9	132153	132147	132145	132149	132320	132150	132350	132137	132358	132283	132269	132268	132171	132188	132364
10	132155	132146	132321	132314	132147	132141	132319	132345	132309	132275	132314	132103	132183	132280	132167
11	132306	132265	132307	132309	132320	132331	132318	132331	132134	132269	132112	132098	132162	132106	132160
12	132298	132299	132316	132304	132324	132438	132294	132312	132311	132348	132348	132097	132327	132075	132120
13	132312	132300	132148	132302	132325	132435	132314	132270	132298	132266	132096	132070	132174	132071	132144
14	132305	132315	132301	132307	132303	132315	132328	132357	132323	132182	132344	132348	132160	132214	132152
15	132312	132299	132136	132327	132324	132316	132335	132344	132301	132271	132087	132098	132297	132064	132130
16	132136	132300	132301	132303	132301	132315	132317	132328	132294	132342	132139	132344	132157	132212	132168
17	132298	132300	132301	132321	132305	132300	132324	132307	132310	132140	132136	132166	132280	132071	132260
18	132133	132147	132147	132141	132325	132321	132343	132349	132329	132322	132139	132139	132168	132187	132107
19	132147	132128	132319	132338	132328	132332	132325	132324	132326	132141	132136	132143	132345	132186	132161
20	132145	132145	132149	132137	132307	132311	132334	132335	132333	132337	132345	132184	132170	132141	132119
21	132137	132147	132145	132148	132323	132311	132316	132346	132307	132339	132102	132055	132200	132102	132105
22	132311	132299	132299	132335	132316	132330	132323	132321	132305	132077	132344	132070	132150	132271	132163
23	132143	132301	132325	132330	132325	132319	132320	132323	132306	132266	132074	132070	132174	132271	132272
25	132139	132157	132155	132304	132141	132294	132317	132346	132305	132077	132102	132073	132325	132082	132267
30	132151	132143	132144	132326	132325	132332	132323	132330	132301	132260	132262	132139	132182	132104	132104
40	132153	132160	132150	132150	132328	132314	132333	132330	132315	132323	132264	132263	132175	132267	132167

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	132099 bytes	–	100%
1,000	132079 bytes	-20 bytes	100%
10,000	132068 bytes	-11 bytes	100%
100,000	132062 bytes	-6 bytes	0.58%
1,000,000	132055 bytes	-7 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)	132260 bytes	+205 bytes (+0.16%)	+41 bytes
1	132776 bytes	+721 bytes (+0.55%)	+557 bytes
2	132782 bytes	+727 bytes (+0.55%)	+563 bytes
3	132631 bytes	+576 bytes (+0.44%)	+412 bytes
4	132548 bytes	+493 bytes (+0.37%)	+329 bytes
5	132375 bytes	+320 bytes (+0.24%)	+156 bytes
6	132219 bytes	+164 bytes (+0.12%)	–
7	132219 bytes	+164 bytes (+0.12%)	–
8	132231 bytes	+176 bytes (+0.13%)	+12 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	88668 bytes	-43387 bytes (-32.86%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	102070 bytes	-29985 bytes (-22.71%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	105815 bytes	-26240 bytes (-19.87%)
Brotli (Wikipedia)	brotli	brotli -q 11	111991 bytes	-20064 bytes (-15.19%)
LZMA2 (Wikipedia)	xz	xz -9	112820 bytes	-19235 bytes (-14.57%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	117262 bytes	-14793 bytes (-11.20%)
Zstandard (Wikipedia)	zstd	zstd -19	119299 bytes	-12756 bytes (-9.66%)

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.