ThreeJS 54 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 834163 bytes (814.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 411352 bytes (401.7k, 49%).

After GZIP compression these minified files vary in size:

Boot	119154 bytes (116.4k)	CDN
unpkg	99779 bytes (97.4k)	CDN
cdnjs	99735 bytes (97.4k)	CDN
gzip -6 (default)	98782 bytes (96.5k)	local copy
gzip -9	98394 bytes (96.1k)	local copy
libdeflate -12	95348 bytes (93.1k)	local copy
7zip -mx=9 -tgzip	95187 bytes (93.0k)	local copy
zultra	95141 bytes (92.9k)	local copy
pigz -11 -n	94873 bytes (92.6k)	local copy
kzip -s0 -rn -b0	94862 bytes (92.6k)	local copy
Zopfli	94778 bytes (92.6k)	local copy
Zopfli (defluff)	94775 bytes (92.6k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r54.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 54 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 4957 bytes by using my ThreeJS 54 Zopfli version instead of the best available CDN (5.23% smaller than cdnjs, 94778 vs. 99735 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 --mls256 --bsr21 --lazy --ohh

(found February 16, 2017)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	256	--mls256
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 (94775 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/r54/build/three.min.js --location | md5sum
8bb1555736f69db3f59a20d363952a60 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r54.min.zopfli.js.gz | md5sum
8bb1555736f69db3f59a20d363952a60 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r54/build/three.min.js --location | sha1sum
77d536e36cf3c32824f58320d97ab59f8249f70d -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r54.min.zopfli.js.gz | sha1sum
77d536e36cf3c32824f58320d97ab59f8249f70d -

These CDNs send you the original file:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	119154 bytes	8bb1555736f69db3f59a20d363952a60	(invalid)
cdnjs	99735 bytes	8bb1555736f69db3f59a20d363952a60	(invalid)

And some CDNs send you a different file:

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
unpkg	99779 bytes	5dfe789bfd5f2219a356e1133f51f34c	> > var window = window \|\| {}; > var self = self \|\| {}; > > // Export the THREE object for Node.js, with > // backwards-compatibility for the old `require()` API. If [...] > // the browser, add `_` as a global object via a string id [...] > // for Closure Compiler "advanced" mode. > if (typeof exports !== 'undefined') { > if (typeof module !== 'undefined' && module.exports) { [...]	July 11, 2016 @ 15:49

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
94778 bytes	-6 bytes	zopfli --i1000000 --mls256 --bsr21 --lazy --ohh	February 16, 2017 @ 13:12
94784 bytes	-6 bytes	zopfli --i100000 --mls256 --bsr21 --lazy --ohh	December 28, 2015 @ 16:15
94790 bytes	-6 bytes	zopfli --i10000 --mls256 --bsr21 --lazy --ohh	November 16, 2015 @ 10:17
94796 bytes	-9 bytes	zopfli --i10000 --mls4096 --bsr19 --lazy --ohh	November 16, 2015 @ 10:15
94805 bytes	-23 bytes	zopfli --i1000 --mls4096 --bsr19 --lazy --ohh	November 16, 2015 @ 09:56
94828 bytes	–	zopfli --i100 --mls4096 --bsr19 --lazy --ohh	November 15, 2015 @ 11:11

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	94990	95004	94994	95000	94868	94949	94888	94951	95047	95133	95132	95049	95068	95047	95054
4	94918	94920	94926	94936	94885	94877	94840	94876	94876	94998	94995	94916	95008	94976	94966
6	94921	94958	94925	95076	94870	94922	94862	94924	94895	94969	94987	94810	94987	94967	94992
7	94904	95008	94925	95007	94893	94866	94976	94866	94884	94890	94983	94870	94957	94980	94986
8	94911	94964	94908	95007	94910	94871	94869	94876	94861	94972	94990	95033	94968	94972	95014
9	94904	95002	94909	94907	94910	94858	94871	94871	94865	94992	94997	94926	94971	94972	94969
10	94961	94903	94906	94860	94941	94873	94906	94871	94863	94884	94831	94826	94967	94967	94969
11	94891	95009	95019	94990	94976	94976	94976	94863	94866	94994	94909	94826	94969	94973	94980
12	94907	94904	94891	95019	94919	94974	94976	94980	94984	94979	94953	94897	94969	94964	94962
13	94926	95003	94909	95011	94859	94856	94855	94857	94860	94884	94972	94859	94964	94964	95019
14	94968	94958	94973	94918	94908	94862	94985	94863	94865	94969	94960	94887	94966	94978	95020
15	94910	95005	94908	95015	94861	94856	94907	94866	94868	94883	94997	94870	94965	94980	94988
16	95087	95053	94913	94904	94919	94988	94856	94979	94860	94886	94833	94814	94970	94965	94988
17	94888	94908	95010	95012	94911	94864	94977	94866	94870	94985	94897	94921	94979	94973	94967
18	94901	94899	95094	95005	94979	94866	94976	94976	94861	94857	94829	94870	94970	94970	94978
19	94976	94905	94907	94907	94906	94852	94886	94887	94853	94859	94968	94791	94986	94969	94970
20	94960	94954	94905	94908	94918	94862	94909	94902	94868	94871	94967	94876	94980	95004	94971
21	94889	94905	94997	95004	94876	94875	94865	94778	94883	94883	94966	94868	94971	94960	94970
22	94967	95054	94971	94906	94909	94956	94916	94978	94867	94970	94890	94889	94985	94972	94988
23	94908	95002	95020	94998	94864	94976	94906	94872	94872	94888	94831	94825	94970	94982	94980
25	94907	94909	94909	95009	94908	94868	94908	94978	94863	94991	94995	94868	94969	94971	94970
30	94962	94910	95010	94913	94910	94977	94977	94982	94859	94870	94799	94864	94966	94977	94967
40	94910	94924	95021	94908	94908	94991	94978	94873	94865	94866	94969	94814	94972	94967	95005

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	94828 bytes	–	100%
1,000	94805 bytes	-23 bytes	100%
10,000	94790 bytes	-15 bytes	100%
100,000	94784 bytes	-6 bytes	0.58%
1,000,000	94778 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)	94862 bytes	+84 bytes (+0.09%)	–
1	95286 bytes	+508 bytes (+0.54%)	+424 bytes
2	95169 bytes	+391 bytes (+0.41%)	+307 bytes
3	95161 bytes	+383 bytes (+0.40%)	+299 bytes
4	95102 bytes	+324 bytes (+0.34%)	+240 bytes
5	95049 bytes	+271 bytes (+0.29%)	+187 bytes
6	95065 bytes	+287 bytes (+0.30%)	+203 bytes
7	95012 bytes	+234 bytes (+0.25%)	+150 bytes
8	95019 bytes	+241 bytes (+0.25%)	+157 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	64553 bytes	-30225 bytes (-31.89%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	74767 bytes	-20011 bytes (-21.11%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	79454 bytes	-15324 bytes (-16.17%)
Brotli (Wikipedia)	brotli	brotli -q 11	79993 bytes	-14785 bytes (-15.60%)
LZMA2 (Wikipedia)	xz	xz -9	80504 bytes	-14274 bytes (-15.06%)
Zstandard (Wikipedia)	zstd	zstd -19	85928 bytes	-8850 bytes (-9.34%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	87410 bytes	-7368 bytes (-7.77%)

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

All trademarks are property of their respective owners. You know, the boring legal stuff.