ThreeJS 131 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1161839 bytes (1,134.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 613631 bytes (599.2k, 53%).

After GZIP compression these minified files vary in size:

unpkg	204989 bytes (200.2k)	CDN
gzip -6 (default)	151530 bytes (148.0k)	local copy
jsdelivr	151357 bytes (147.8k)	CDN
gzip -9	151006 bytes (147.5k)	local copy
7zip -mx=9 -tgzip	145723 bytes (142.3k)	local copy
libdeflate -12	145720 bytes (142.3k)	local copy
zultra	145488 bytes (142.1k)	local copy
pigz -11 -n	145378 bytes (142.0k)	local copy
kzip -s0 -rn -b0	145232 bytes (141.8k)	local copy
Zopfli	145225 bytes (141.8k)	local copy
Zopfli (defluff)	145220 bytes (141.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r131.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 131 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 6132 bytes by using my ThreeJS 131 Zopfli version instead of the best available CDN (4.22% smaller than jsdelivr, 145225 vs. 151357 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 --mls8192 --bsr16 --lazy --ohh

(found August 4, 2021)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	8192	--mls8192
block splitting recursion	16	--bsr16
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 (145220 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/r131/build/three.min.js --location | md5sum
dcc3a5bfd7e233e56bc0bfa2e316c545 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r131.min.zopfli.js.gz | md5sum
dcc3a5bfd7e233e56bc0bfa2e316c545 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r131/build/three.min.js --location | sha1sum
b61a50f5a02f0b32ad6f84d10299953cdb8ff7c9 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r131.min.zopfli.js.gz | sha1sum
b61a50f5a02f0b32ad6f84d10299953cdb8ff7c9 -

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
unpkg	204989 bytes	7f0962c7b686042fdf711c7843657732	< !function(t,e){"object"==typeof exports&&"undefined"!=type [...] > !function(t,e){"object"==typeof exports&&"undefined"!=type [...]	(invalid)
jsdelivr	151357 bytes	7f0962c7b686042fdf711c7843657732	< !function(t,e){"object"==typeof exports&&"undefined"!=type [...] > !function(t,e){"object"==typeof exports&&"undefined"!=type [...]	August 2, 2021 @ 17:03

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
145225 bytes	-3 bytes	zopfli --i1000000 --mls8192 --bsr16 --lazy --ohh	August 4, 2021 @ 15:57
145228 bytes	-7 bytes	zopfli --i100000 --mls8192 --bsr16 --lazy --ohh	August 2, 2021 @ 21:03
145235 bytes	-18 bytes	zopfli --i10000 --mls8192 --bsr16 --lazy --ohh	August 2, 2021 @ 18:06
145253 bytes	-20 bytes	zopfli --i1000 --mls8192 --bsr16 --lazy --ohh	August 2, 2021 @ 17:34
145273 bytes	-19 bytes	zopfli --i1000 --mls8192 --bsr4 --lazy --ohh	August 2, 2021 @ 17:31
145292 bytes	–	zopfli --i100 --mls8192 --bsr16 --lazy --ohh	August 2, 2021 @ 17:12

If there are multiple parameter sets yielding the same compressed size, only the first one found is shown.

Most recent activity on August 4, 2021 @ 17:50.

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	145459	145501	145510	145490	145467	145519	145464	145461	145437	145493	145448	145444	145439	145464	145454
4	145406	145404	145335	145337	145317	145326	145378	145485	145558	145439	145474	145365	145247	145361	145372
6	145430	145438	145442	145432	145447	145431	145310	145366	145399	145386	145362	145356	145306	145382	145298
7	145439	145434	145442	145431	145431	145443	145424	145436	145398	145377	145364	145371	145279	145336	145291
8	145406	145381	145463	145438	145433	145444	145431	145538	145438	145450	145362	145451	145344	145382	145381
9	145532	145437	145440	145431	145446	145426	145427	145431	145383	145392	145415	145392	145346	145354	145353
10	145409	145370	145372	145372	145312	145311	145440	145383	145381	145395	145365	145362	145273	145348	145311
11	145515	145498	145431	145437	145430	145433	145434	145382	145380	145402	145440	145359	145390	145276	145396
12	145393	145439	145443	145451	145439	145439	145359	145371	145438	145380	145369	145364	145365	145376	145396
13	145427	145436	145355	145316	145424	145430	145440	145388	145418	145397	145369	145383	145390	145353	145364
14	145346	145432	145438	145440	145303	145426	145429	145434	145407	145383	145361	145352	145375	145375	145377
15	145433	145431	145447	145424	145428	145430	145431	145434	145435	145386	145388	145369	145351	145356	145359
16	145440	145435	145439	145432	145433	145426	145412	145438	145440	145513	145384	145372	145225	145371	145374
17	145431	145433	145435	145438	145519	145431	145438	145428	145410	145414	145375	145385	145299	145365	145374
18	145447	145438	145434	145439	145431	145434	145360	145370	145382	145375	145382	145372	145293	145385	145367
19	145432	145508	145326	145338	145428	145435	145409	145367	145353	145351	145375	145371	145409	145359	145359
20	145446	145370	145426	145530	145426	145431	145429	145363	145342	145376	145407	145389	145382	145359	145381
21	145519	145421	145450	145430	145425	145440	145433	145433	145378	145374	145416	145375	145386	145344	145381
22	145432	145439	145439	145436	145431	145432	145427	145433	145380	145362	145384	145373	145349	145360	145350
23	145520	145432	145445	145439	145424	145432	145430	145393	145383	145359	145386	145400	145390	145393	145374
25	145451	145452	145439	145426	145404	145434	145427	145378	145366	145338	145410	145373	145383	145351	145370
30	145524	145436	145446	145437	145431	145430	145429	145407	145378	145357	145374	145374	145379	145362	145368
40	145443	145433	145442	145435	145427	145433	145353	145436	145430	145424	145375	145376	145381	145353	145352

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	145292 bytes	–	100%
1,000	145253 bytes	-39 bytes	100%
10,000	145235 bytes	-18 bytes	100%
100,000	145228 bytes	-7 bytes	0.58%
1,000,000	145225 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)	145232 bytes	+7 bytes (0.00%)	–
1	145764 bytes	+539 bytes (+0.37%)	+532 bytes
2	145730 bytes	+505 bytes (+0.35%)	+498 bytes
3	145645 bytes	+420 bytes (+0.29%)	+413 bytes
4	145501 bytes	+276 bytes (+0.19%)	+269 bytes
5	145514 bytes	+289 bytes (+0.20%)	+282 bytes
6	145500 bytes	+275 bytes (+0.19%)	+268 bytes
7	145439 bytes	+214 bytes (+0.15%)	+207 bytes
8	145475 bytes	+250 bytes (+0.17%)	+243 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	98277 bytes	-46948 bytes (-32.33%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	113300 bytes	-31925 bytes (-21.98%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	116908 bytes	-28317 bytes (-19.50%)
Brotli (Wikipedia)	brotli	brotli -q 11	123107 bytes	-22118 bytes (-15.23%)
LZMA2 (Wikipedia)	xz	xz -9	123512 bytes	-21713 bytes (-14.95%)
Zstandard (Wikipedia)	zstd	zstd -19	129693 bytes	-15532 bytes (-10.70%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	130930 bytes	-14295 bytes (-9.84%)

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.