ThreeJS 93 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1090923 bytes (1,065.4k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 539972 bytes (527.3k, 49%).

After GZIP compression these minified files vary in size:

cdnjs	137600 bytes (134.4k)	CDN
unpkg	136507 bytes (133.3k)	CDN
gzip -6 (default)	136130 bytes (132.9k)	local copy
jsdelivr	136077 bytes (132.9k)	CDN
gzip -9	135682 bytes (132.5k)	local copy
libdeflate -12	131089 bytes (128.0k)	local copy
7zip -mx=9 -tgzip	131058 bytes (128.0k)	local copy
zultra	130915 bytes (127.8k)	local copy
kzip -s0 -rn -b0	130715 bytes (127.7k)	local copy
pigz -11 -n	130680 bytes (127.6k)	local copy
Zopfli	130575 bytes (127.5k)	local copy
Zopfli (defluff)	130571 bytes (127.5k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r93.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 93 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 5502 bytes by using my ThreeJS 93 Zopfli version instead of the best available CDN (4.21% smaller than jsdelivr, 130575 vs. 136077 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 --bsr20 --lazy --ohh

(found June 6, 2018)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4096	--mls4096
block splitting recursion	20	--bsr20
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 (130571 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/r93/build/three.min.js --location | md5sum
11fe0be6e2e0e4d83d4af60fbe8ab598 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r93.min.zopfli.js.gz | md5sum
11fe0be6e2e0e4d83d4af60fbe8ab598 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r93/build/three.min.js --location | sha1sum
b9a9c7a9223a4e0db698ff68ecd9350ee0290a1d -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r93.min.zopfli.js.gz | sha1sum
b9a9c7a9223a4e0db698ff68ecd9350ee0290a1d -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
cdnjs	137600 bytes	11fe0be6e2e0e4d83d4af60fbe8ab598	(invalid)
unpkg	136507 bytes	11fe0be6e2e0e4d83d4af60fbe8ab598	(invalid)
jsdelivr	136077 bytes	11fe0be6e2e0e4d83d4af60fbe8ab598	June 4, 2018 @ 08:57

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
130575 bytes	-4 bytes	zopfli --i1000000 --mls4096 --bsr20 --lazy --ohh	June 6, 2018 @ 09:23
130579 bytes	-8 bytes	zopfli --i100000 --mls4096 --bsr20 --lazy --ohh	June 4, 2018 @ 19:05
130587 bytes	-1 byte	zopfli --i10000 --mls4096 --bsr21 --lazy --ohh	June 4, 2018 @ 14:32
130588 bytes	-6 bytes	zopfli --i10000 --mls2048 --bsr25 --lazy --ohh	June 4, 2018 @ 13:15
130594 bytes	-4 bytes	zopfli --i1000 --mls2048 --bsr25 --lazy --ohh	June 4, 2018 @ 09:40
130598 bytes	-6 bytes	zopfli --i1000 --mls1024 --bsr20 --lazy --ohh	June 4, 2018 @ 09:36
130604 bytes	-10 bytes	zopfli --i1000 --mls4096 --bsr7 --lazy --ohh	June 4, 2018 @ 09:36
130614 bytes	–	zopfli --i100 --mls4096 --bsr22 --lazy --ohh	June 4, 2018 @ 09:19

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 @ 12:49.

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	130746	130746	130916	130896	130775	130685	130830	130787	130773	130835	130850	130842	130659	130669	130655
4	130845	130842	130820	130816	130782	130901	130805	130785	130808	130816	130884	130804	130876	130880	130881
6	130828	130818	130820	130816	130738	130807	130742	130877	130827	130796	130862	130791	130682	130879	130797
7	130823	130789	130807	130795	130817	130875	130849	130865	130802	130794	130688	130596	130836	130846	130892
8	130809	130803	130794	130801	130793	130798	130840	130829	130837	130713	130839	130594	130839	130712	130801
9	130660	130653	130809	130799	130668	130796	130884	130874	130794	130796	130791	130781	130835	130829	130803
10	130664	130806	130810	130792	130839	130780	130850	130807	130963	130795	130836	130832	130686	130796	130790
11	130669	130800	130808	130807	130848	130791	130831	130857	130794	130651	130590	130787	130669	130596	130820
12	130830	130662	130819	130823	130801	130806	130819	130814	130793	130846	130855	130595	130846	130846	130767
13	130820	130652	130818	130762	130853	130816	130876	130886	130791	130792	130580	130609	130592	130608	130778
14	130828	130653	130823	130818	130837	130824	130848	130840	130844	130702	130860	130832	130828	130836	130764
15	130819	130668	130808	130822	130856	130845	130871	130876	130817	130661	130658	130663	130821	130597	130778
16	130821	130677	130818	130841	130826	130851	130851	130868	130845	130704	130851	130659	130833	130702	130781
17	130826	130822	130821	130825	130849	130840	130847	130866	130845	130665	130675	130661	130667	130797	130777
18	130805	130822	130818	130823	130816	130816	130851	130850	130821	130688	130851	130659	130868	130868	130598
19	130805	130802	130663	130838	130837	130835	130825	130853	130850	130650	130658	130654	130840	130846	130763
20	130804	130795	130807	130679	130814	130821	130850	130854	130842	130590	130837	130575	130842	130604	130761
21	130808	130791	130833	130675	130677	130651	130840	130844	130842	130658	130602	130580	130844	130596	130758
22	130833	130808	130820	130817	130843	130828	130681	130853	130819	130849	130853	130590	130862	130598	130761
23	130820	130820	130822	130818	130821	130824	130837	130848	130872	130662	130591	130597	130840	130696	130777
25	130822	130651	130658	130649	130655	130798	130799	130875	130802	130664	130581	130592	130865	130595	130795
30	130659	130805	130816	130673	130834	130821	130828	130855	130840	130842	130848	130665	130873	130596	130796
40	130663	130760	130660	130667	130838	130820	130852	130847	130849	130795	130796	130794	130833	130802	130763

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	130614 bytes	–	100%
1,000	130594 bytes	-20 bytes	100%
10,000	130587 bytes	-7 bytes	100%
100,000	130579 bytes	-8 bytes	1.16%
1,000,000	130575 bytes	-4 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)	130715 bytes	+140 bytes (+0.11%)	–
1	131310 bytes	+735 bytes (+0.56%)	+595 bytes
2	131290 bytes	+715 bytes (+0.55%)	+575 bytes
3	131127 bytes	+552 bytes (+0.42%)	+412 bytes
4	131034 bytes	+459 bytes (+0.35%)	+319 bytes
5	130922 bytes	+347 bytes (+0.27%)	+207 bytes
6	130893 bytes	+318 bytes (+0.24%)	+178 bytes
7	130782 bytes	+207 bytes (+0.16%)	+67 bytes
8	130756 bytes	+181 bytes (+0.14%)	+41 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	87663 bytes	-42912 bytes (-32.86%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	100938 bytes	-29637 bytes (-22.70%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	104872 bytes	-25703 bytes (-19.68%)
Brotli (Wikipedia)	brotli	brotli -q 11	110873 bytes	-19702 bytes (-15.09%)
LZMA2 (Wikipedia)	xz	xz -9	111644 bytes	-18931 bytes (-14.50%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	116037 bytes	-14538 bytes (-11.13%)
Zstandard (Wikipedia)	zstd	zstd -19	118101 bytes	-12474 bytes (-9.55%)

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.