ThreeJS 96 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1110617 bytes (1,084.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 548943 bytes (536.1k, 49%).

After GZIP compression these minified files vary in size:

cdnjs	139326 bytes (136.1k)	CDN
unpkg	138221 bytes (135.0k)	CDN
gzip -6 (default)	137899 bytes (134.7k)	local copy
jsdelivr	137781 bytes (134.6k)	CDN
gzip -9	137435 bytes (134.2k)	local copy
7zip -mx=9 -tgzip	132729 bytes (129.6k)	local copy
libdeflate -12	132676 bytes (129.6k)	local copy
zultra	132540 bytes (129.4k)	local copy
kzip -s0 -rn -b6	132408 bytes (129.3k)	local copy
pigz -11 -n	132353 bytes (129.3k)	local copy
Zopfli	132256 bytes (129.2k)	local copy
Zopfli (defluff)	132251 bytes (129.2k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r96.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 96 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 5525 bytes by using my ThreeJS 96 Zopfli version instead of the best available CDN (4.18% smaller than jsdelivr, 132256 vs. 137781 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 --bsr9 --lazy --ohh

(found September 2, 2018)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4096	--mls4096
block splitting recursion	9	--bsr9
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 5 more bytes (132251 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/r96/build/three.min.js --location | md5sum
6688fe8b1dca184cc16d0833cd5fb78c -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r96.min.zopfli.js.gz | md5sum
6688fe8b1dca184cc16d0833cd5fb78c -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r96/build/three.min.js --location | sha1sum
1b1ff8df7ff1d28bfbf927a2c8d8e612e795563d -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r96.min.zopfli.js.gz | sha1sum
1b1ff8df7ff1d28bfbf927a2c8d8e612e795563d -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
cdnjs	139326 bytes	6688fe8b1dca184cc16d0833cd5fb78c	(invalid)
unpkg	138221 bytes	6688fe8b1dca184cc16d0833cd5fb78c	(invalid)
jsdelivr	137781 bytes	6688fe8b1dca184cc16d0833cd5fb78c	August 31, 2018 @ 19:02

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
132256 bytes	-3 bytes	zopfli --i1000000 --mls4096 --bsr9 --lazy --ohh	September 2, 2018 @ 17:43
132259 bytes	-6 bytes	zopfli --i100000 --mls4096 --bsr9 --lazy --ohh	September 1, 2018 @ 12:21
132265 bytes	-1 byte	zopfli --i10000 --mls4096 --bsr9 --lazy --ohh	September 1, 2018 @ 01:27
132266 bytes	-3 bytes	zopfli --i10000 --mls4096 --bsr23 --lazy --ohh	September 1, 2018 @ 01:26
132269 bytes	-5 bytes	zopfli --i10000 --mls4096 --bsr13 --lazy --ohh	September 1, 2018 @ 00:30
132274 bytes	-20 bytes	zopfli --i1000 --mls4096 --bsr23 --lazy --ohh	August 31, 2018 @ 19:28
132294 bytes	–	zopfli --i100 --mls4096 --bsr23 --lazy --ohh	August 31, 2018 @ 19:11

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 @ 12:52.

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	132431	132557	132407	132402	132497	132550	132501	132360	132388	132508	132428	132355	132352	132358	132471
4	132555	132559	132483	132552	132546	132397	132396	132404	132401	132413	132415	132471	132458	132377	132544
6	132496	132409	132403	132491	132365	132500	132382	132496	132367	132379	132315	132459	132510	132502	132541
7	132491	132481	132500	132489	132495	132483	132506	132499	132618	132366	132387	132310	132369	132529	132503
8	132494	132332	132336	132337	132498	132472	132500	132485	132488	132364	132506	132307	132363	132497	132524
9	132328	132339	132339	132361	132539	132359	132405	132508	132366	132360	132497	132256	132375	132503	132473
10	132331	132334	132326	132491	132492	132317	132494	132333	132515	132368	132494	132298	132361	132525	132528
11	132474	132510	132501	132495	132512	132483	132518	132519	132461	132357	132389	132298	132372	132527	132522
12	132485	132490	132500	132497	132492	132479	132488	132495	132494	132359	132393	132312	132362	132499	132550
13	132496	132494	132495	132494	132491	132502	132494	132392	132497	132492	132305	132261	132502	132520	132543
14	132495	132491	132505	132470	132498	132504	132511	132498	132501	132359	132358	132362	132370	132360	132282
15	132486	132490	132494	132500	132498	132485	132490	132391	132493	132321	132501	132303	132374	132546	132467
16	132477	132492	132333	132449	132492	132446	132507	132386	132497	132359	132389	132296	132359	132361	132365
17	132507	132322	132347	132483	132528	132499	132516	132525	132507	132353	132495	132329	132357	132518	132333
18	132338	132344	132342	132336	132488	132482	132514	132387	132518	132350	132383	132313	132536	132519	132416
19	132324	132322	132500	132503	132488	132347	132537	132527	132367	132356	132360	132356	132366	132529	132511
20	132322	132506	132342	132504	132511	132481	132499	132386	132488	132337	132393	132304	132350	132360	132442
21	132491	132322	132323	132501	132526	132319	132488	132536	132505	132360	132294	132307	132360	132518	132432
22	132487	132490	132495	132491	132489	132487	132498	132388	132505	132364	132493	132299	132380	132531	132399
23	132480	132493	132505	132492	132521	132497	132492	132384	132495	132380	132494	132262	132374	132519	132468
25	132333	132329	132344	132331	132344	132478	132497	132517	132487	132365	132295	132313	132357	132520	132334
30	132321	132363	132325	132493	132333	132489	132497	132388	132341	132360	132296	132306	132358	132522	132415
40	132315	132335	132322	132487	132329	132489	132503	132530	132484	132360	132397	132456	132376	132499	132435

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	132294 bytes	–	100%
1,000	132274 bytes	-20 bytes	100%
10,000	132265 bytes	-9 bytes	100%
100,000	132259 bytes	-6 bytes	0.87%
1,000,000	132256 bytes	-3 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)	132412 bytes	+156 bytes (+0.12%)	+4 bytes
1	132995 bytes	+739 bytes (+0.56%)	+587 bytes
2	132982 bytes	+726 bytes (+0.55%)	+574 bytes
3	132809 bytes	+553 bytes (+0.42%)	+401 bytes
4	132717 bytes	+461 bytes (+0.35%)	+309 bytes
5	132632 bytes	+376 bytes (+0.28%)	+224 bytes
6	132408 bytes	+152 bytes (+0.11%)	–
7	132438 bytes	+182 bytes (+0.14%)	+30 bytes
8	132422 bytes	+166 bytes (+0.13%)	+14 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	88825 bytes	-43431 bytes (-32.84%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	102367 bytes	-29889 bytes (-22.60%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	106123 bytes	-26133 bytes (-19.76%)
Brotli (Wikipedia)	brotli	brotli -q 11	112283 bytes	-19973 bytes (-15.10%)
LZMA2 (Wikipedia)	xz	xz -9	113164 bytes	-19092 bytes (-14.44%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	118076 bytes	-14180 bytes (-10.72%)
Zstandard (Wikipedia)	zstd	zstd -19	119106 bytes	-13150 bytes (-9.94%)

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.