ThreeJS 53 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 807316 bytes (788.4k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 392908 bytes (383.7k, 49%).

After GZIP compression these minified files vary in size:

Boot	115546 bytes (112.8k)	CDN
cdnjs	97121 bytes (94.8k)	CDN
gzip -6 (default)	96127 bytes (93.9k)	local copy
gzip -9	95749 bytes (93.5k)	local copy
libdeflate -12	92843 bytes (90.7k)	local copy
7zip -mx=9 -tgzip	92748 bytes (90.6k)	local copy
zultra	92655 bytes (90.5k)	local copy
pigz -11 -n	92491 bytes (90.3k)	local copy
kzip -s0 -rn -b8	92475 bytes (90.3k)	local copy
Zopfli	92392 bytes (90.2k)	local copy
Zopfli (defluff)	92389 bytes (90.2k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r53.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 53 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 4729 bytes by using my ThreeJS 53 Zopfli version instead of the best available CDN (5.12% smaller than cdnjs, 92392 vs. 97121 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 --bsr25 --lazy --ohh

(found February 16, 2017)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	256	--mls256
block splitting recursion	25	--bsr25
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 (92389 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/r53/build/three.min.js --location | md5sum
77139666a0b6052e25e641be36047712 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r53.min.zopfli.js.gz | md5sum
77139666a0b6052e25e641be36047712 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r53/build/three.min.js --location | sha1sum
522049d093c0cec504a1e9f30fb4284b02ae5537 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r53.min.zopfli.js.gz | sha1sum
522049d093c0cec504a1e9f30fb4284b02ae5537 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	115546 bytes	77139666a0b6052e25e641be36047712	(invalid)
cdnjs	97121 bytes	77139666a0b6052e25e641be36047712	(invalid)

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
92392 bytes	-6 bytes	zopfli --i1000000 --mls256 --bsr25 --lazy --ohh	February 16, 2017 @ 17:22
92398 bytes	-9 bytes	zopfli --i100000 --mls256 --bsr25 --lazy --ohh	December 22, 2015 @ 20:06
92407 bytes	-3 bytes	zopfli --i10000 --mls256 --bsr25 --lazy --ohh	November 17, 2015 @ 01:22
92410 bytes	-2 bytes	zopfli --i10000 --mls256 --bsr23 --lazy --ohh	November 16, 2015 @ 10:30
92412 bytes	-22 bytes	zopfli --i1000 --mls256 --bsr25 --lazy --ohh	November 16, 2015 @ 09:37
92434 bytes	–	zopfli --i100 --mls256 --bsr25 --lazy --ohh	November 15, 2015 @ 12:25

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 @ 12:47.

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	92552	92515	92530	92580	92501	92541	92554	92582	92588	92584	92582	92580	92584	92583	92573
4	92526	92517	92520	92462	92461	92467	92507	92569	92555	92558	92448	92572	92482	92565	92555
6	92532	92541	92544	92481	92515	92537	92523	92478	92535	92526	92532	92525	92438	92555	92572
7	92480	92533	92453	92505	92478	92429	92433	92412	92550	92559	92547	92533	92583	92563	92551
8	92492	92525	92577	92565	92513	92530	92480	92439	92485	92572	92426	92449	92480	92573	92552
9	92444	92459	92539	92488	92484	92438	92438	92412	92573	92567	92435	92508	92501	92554	92552
10	92526	92529	92529	92471	92496	92481	92427	92426	92561	92566	92420	92444	92525	92553	92576
11	92471	92490	92498	92487	92483	92426	92424	92432	92425	92504	92439	92542	92443	92573	92575
12	92418	92490	92518	92477	92495	92477	92474	92420	92480	92572	92423	92451	92446	92572	92582
13	92496	92522	92425	92422	92447	92460	92430	92418	92539	92422	92431	92440	92515	92570	92569
14	92519	92485	92484	92466	92488	92479	92429	92426	92424	92422	92447	92443	92474	92555	92569
15	92479	92495	92513	92469	92419	92435	92419	92432	92422	92430	92449	92442	92534	92572	92559
16	92484	92486	92486	92522	92481	92487	92488	92475	92423	92563	92432	92444	92427	92557	92556
17	92479	92447	92444	92474	92423	92429	92431	92434	92563	92573	92427	92448	92424	92558	92575
18	92546	92519	92497	92478	92487	92435	92425	92430	92428	92428	92432	92420	92547	92555	92552
19	92467	92446	92536	92499	92428	92532	92427	92471	92426	92421	92437	92445	92439	92557	92569
20	92474	92520	92434	92471	92421	92474	92470	92414	92426	92558	92437	92447	92448	92570	92586
21	92496	92431	92444	92474	92442	92433	92422	92417	92425	92572	92432	92447	92479	92570	92567
22	92431	92530	92494	92495	92453	92436	92433	92433	92569	92563	92436	92456	92437	92570	92566
23	92471	92518	92475	92473	92425	92439	92434	92402	92423	92427	92449	92489	92510	92570	92578
25	92469	92492	92472	92433	92430	92425	92424	92392	92424	92426	92440	92452	92440	92570	92566
30	92474	92496	92432	92495	92429	92436	92418	92428	92428	92425	92440	92447	92427	92570	92575
40	92474	92487	92551	92485	92424	92469	92429	92426	92423	92561	92441	92489	92453	92563	92569

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	92434 bytes	–	100%
1,000	92412 bytes	-22 bytes	100%
10,000	92407 bytes	-5 bytes	100%
100,000	92398 bytes	-9 bytes	0.58%
1,000,000	92392 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)	92485 bytes	+93 bytes (+0.10%)	+10 bytes
1	92694 bytes	+302 bytes (+0.33%)	+219 bytes
2	92681 bytes	+289 bytes (+0.31%)	+206 bytes
3	92630 bytes	+238 bytes (+0.26%)	+155 bytes
4	92613 bytes	+221 bytes (+0.24%)	+138 bytes
5	92514 bytes	+122 bytes (+0.13%)	+39 bytes
6	92504 bytes	+112 bytes (+0.12%)	+29 bytes
7	92491 bytes	+99 bytes (+0.11%)	+16 bytes
8	92475 bytes	+83 bytes (+0.09%)	–

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	62884 bytes	-29508 bytes (-31.94%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	72772 bytes	-19620 bytes (-21.24%)
Brotli (Wikipedia)	brotli	brotli -q 11	77763 bytes	-14629 bytes (-15.83%)
LZMA2 (Wikipedia)	xz	xz -9	78224 bytes	-14168 bytes (-15.33%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	78405 bytes	-13987 bytes (-15.14%)
Zstandard (Wikipedia)	zstd	zstd -19	83529 bytes	-8863 bytes (-9.59%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	84518 bytes	-7874 bytes (-8.52%)

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.