ThreeJS 87 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1043973 bytes (1,019.5k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 511098 bytes (499.1k, 49%).

After GZIP compression these minified files vary in size:

cdnjs	131347 bytes (128.3k)	CDN
unpkg	130081 bytes (127.0k)	CDN
gzip -6 (default)	129914 bytes (126.9k)	local copy
jsdelivr	129865 bytes (126.8k)	CDN
gzip -9	129486 bytes (126.5k)	local copy
7zip -mx=9 -tgzip	124949 bytes (122.0k)	local copy
libdeflate -12	124928 bytes (122.0k)	local copy
zultra	124844 bytes (121.9k)	local copy
kzip -s0 -rn -b0	124698 bytes (121.8k)	local copy
pigz -11 -n	124689 bytes (121.8k)	local copy
Zopfli	124489 bytes (121.6k)	local copy
Zopfli (defluff)	124483 bytes (121.6k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/threejs/three-r87.min.js (or via HTTPS)

You will automatically get the smallest ThreeJS 87 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 5376 bytes by using my ThreeJS 87 Zopfli version instead of the best available CDN (4.32% smaller than jsdelivr, 124489 vs. 129865 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 --mls2048 --bsr16 --lazy --ohh

(found August 28, 2017)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	2048	--mls2048
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 6 more bytes (124483 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/r87/build/three.min.js --location | md5sum
61269fcecc3ab8c56cc34708403c8138 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r87.min.zopfli.js.gz | md5sum
61269fcecc3ab8c56cc34708403c8138 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mrdoob/three.js/r87/build/three.min.js --location | sha1sum
f9b95e1f33215d213943fd50cde00c0aa901d834 -
curl --silent --compressed https://minime.stephan-brumme.com/files/threejs/three-r87.min.zopfli.js.gz | sha1sum
f9b95e1f33215d213943fd50cde00c0aa901d834 -

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
cdnjs	131347 bytes	cf699f9a11c6d3f3171428919b427e13	< g.map[p],void 0===t&&(t=new Ie(p),p=g,g=t,p.seq.push(g),p. [...] > g.map[p],void 0===t&&(t=new Ie(p),p=g,g=t,p.seq.push(g),p. [...] < "scale");p=b.getUniformLocation(A,"rotation");t=b.getUnifo [...] < Y.matrixWorld.elements[13],Y.matrixWorld.elements[14]),v.a [...] > "scale");p=b.getUniformLocation(A,"rotation");t=b.getUnifo [...] > Y.matrixWorld.elements[13],Y.matrixWorld.elements[14]),v.a [...] < C.scale&&(ga.x=C.x,ga.y=C.y,ga.z=C.z,J=C.sizeC.scale/la.w [...] < c,d,e,f,g,h,k);this.needsUpdate=!0}function Lf(a,b,c,d,e){ [...] > C.scale&&(ga.x=C.x,ga.y=C.y,ga.z=C.z,J=C.sizeC.scale/la.w [...] > c,d,e,f,g,h,k);this.needsUpdate=!0}function Lf(a,b,c,d,e){ [...] [...]	(invalid)
unpkg	130081 bytes	cf699f9a11c6d3f3171428919b427e13	< g.map[p],void 0===t&&(t=new Ie(p),p=g,g=t,p.seq.push(g),p. [...] > g.map[p],void 0===t&&(t=new Ie(p),p=g,g=t,p.seq.push(g),p. [...] < "scale");p=b.getUniformLocation(A,"rotation");t=b.getUnifo [...] < Y.matrixWorld.elements[13],Y.matrixWorld.elements[14]),v.a [...] > "scale");p=b.getUniformLocation(A,"rotation");t=b.getUnifo [...] > Y.matrixWorld.elements[13],Y.matrixWorld.elements[14]),v.a [...] < C.scale&&(ga.x=C.x,ga.y=C.y,ga.z=C.z,J=C.sizeC.scale/la.w [...] < c,d,e,f,g,h,k);this.needsUpdate=!0}function Lf(a,b,c,d,e){ [...] > C.scale&&(ga.x=C.x,ga.y=C.y,ga.z=C.z,J=C.sizeC.scale/la.w [...] > c,d,e,f,g,h,k);this.needsUpdate=!0}function Lf(a,b,c,d,e){ [...] [...]	(invalid)
jsdelivr	129865 bytes	cf699f9a11c6d3f3171428919b427e13	< g.map[p],void 0===t&&(t=new Ie(p),p=g,g=t,p.seq.push(g),p. [...] > g.map[p],void 0===t&&(t=new Ie(p),p=g,g=t,p.seq.push(g),p. [...] < "scale");p=b.getUniformLocation(A,"rotation");t=b.getUnifo [...] < Y.matrixWorld.elements[13],Y.matrixWorld.elements[14]),v.a [...] > "scale");p=b.getUniformLocation(A,"rotation");t=b.getUnifo [...] > Y.matrixWorld.elements[13],Y.matrixWorld.elements[14]),v.a [...] < C.scale&&(ga.x=C.x,ga.y=C.y,ga.z=C.z,J=C.sizeC.scale/la.w [...] < c,d,e,f,g,h,k);this.needsUpdate=!0}function Lf(a,b,c,d,e){ [...] > C.scale&&(ga.x=C.x,ga.y=C.y,ga.z=C.z,J=C.sizeC.scale/la.w [...] > c,d,e,f,g,h,k);this.needsUpdate=!0}function Lf(a,b,c,d,e){ [...] [...]	November 9, 2017 @ 11:40

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
124489 bytes	-5 bytes	zopfli --i1000000 --mls2048 --bsr16 --lazy --ohh	August 28, 2017 @ 08:24
124494 bytes	-7 bytes	zopfli --i100000 --mls2048 --bsr16 --lazy --ohh	August 26, 2017 @ 22:47
124501 bytes	-6 bytes	zopfli --i10000 --mls2048 --bsr16 --lazy --ohh	August 25, 2017 @ 16:54
124507 bytes	-5 bytes	zopfli --i1000 --mls2048 --bsr16 --lazy --ohh	August 25, 2017 @ 12:48
124512 bytes	-29 bytes	zopfli --i1000 --mls2048 --bsr7 --lazy --ohh	August 25, 2017 @ 12:48
124541 bytes	-2 bytes	zopfli --i1000 --mls2048 --bsr13 --lazy --ohh	August 25, 2017 @ 12:47
124543 bytes	–	zopfli --i100 --mls2048 --bsr16 --lazy --ohh	August 25, 2017 @ 12:15

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 @ 12:56.

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	124842	124789	124750	124808	124795	124775	124811	124814	124684	124722	124705	124732	124714	124708	124738
4	124678	124686	124675	124727	124668	124667	124714	124637	124641	124642	124678	124675	124655	124655	124663
6	124700	124703	124866	124661	124658	124707	124622	124705	124629	124621	124681	124682	124647	124671	124664
7	124682	124639	124688	124630	124637	124640	124643	124678	124655	124656	124495	124625	124649	124670	124624
8	124698	124688	124688	124711	124717	124665	124663	124668	124640	124663	124603	124631	124652	124665	124652
9	124752	124761	124745	124665	124694	124670	124701	124686	124624	124632	124669	124676	124649	124640	124653
10	124671	124677	124669	124705	124713	124698	124662	124655	124660	124632	124551	124653	124630	124630	124644
11	124646	124721	124677	124653	124694	124675	124671	124597	124628	124663	124646	124675	124647	124649	124664
12	124677	124679	124664	124662	124664	124658	124658	124657	124623	124664	124538	124545	124649	124645	124656
13	124681	124712	124676	124697	124665	124630	124625	124653	124649	124625	124534	124667	124649	124630	124656
14	124675	124673	124691	124698	124706	124662	124670	124653	124656	124697	124529	124620	124655	124650	124628
15	124671	124680	124625	124689	124661	124704	124657	124655	124659	124701	124650	124624	124641	124661	124658
16	124638	124712	124689	124702	124678	124677	124660	124657	124621	124621	124489	124675	124646	124671	124653
17	124683	124678	124681	124689	124672	124710	124696	124671	124630	124662	124664	124670	124662	124665	124659
18	124673	124676	124673	124676	124660	124703	124705	124678	124628	124664	124534	124624	124647	124674	124660
19	124706	124709	124679	124662	124707	124676	124618	124668	124672	124664	124655	124675	124645	124639	124622
20	124645	124649	124670	124667	124656	124638	124705	124657	124637	124637	124534	124673	124647	124639	124653
21	124680	124677	124690	124696	124692	124708	124679	124659	124633	124624	124534	124626	124647	124631	124624
22	124683	124676	124695	124699	124664	124710	124704	124627	124627	124702	124534	124627	124647	124628	124663
23	124682	124678	124676	124673	124670	124666	124660	124653	124646	124662	124646	124655	124644	124629	124669
25	124671	124673	124658	124622	124658	124706	124627	124620	124654	124663	124545	124626	124642	124646	124650
30	124670	124674	124673	124699	124665	124677	124676	124653	124620	124699	124644	124625	124643	124623	124621
40	124674	124674	124669	124696	124717	124707	124658	124658	124655	124622	124538	124673	124648	124638	124629

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	124543 bytes	–	100%
1,000	124507 bytes	-36 bytes	100%
10,000	124501 bytes	-6 bytes	100%
100,000	124494 bytes	-7 bytes	0.58%
1,000,000	124489 bytes	-5 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)	124698 bytes	+209 bytes (+0.17%)	–
1	125181 bytes	+692 bytes (+0.56%)	+483 bytes
2	125179 bytes	+690 bytes (+0.55%)	+481 bytes
3	124937 bytes	+448 bytes (+0.36%)	+239 bytes
4	124871 bytes	+382 bytes (+0.31%)	+173 bytes
5	124740 bytes	+251 bytes (+0.20%)	+42 bytes
6	124780 bytes	+291 bytes (+0.23%)	+82 bytes
7	124727 bytes	+238 bytes (+0.19%)	+29 bytes
8	124708 bytes	+219 bytes (+0.18%)	+10 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 - but your browser doesn't support it.

Algorithm	Program	Parameters	Size	Compared To Best Zopfli
ZPAQ (Wikipedia)	zpaq	zpaq -method 69	84423 bytes	-40066 bytes (-32.18%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	97006 bytes	-27483 bytes (-22.08%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	102881 bytes	-21608 bytes (-17.36%)
Brotli (Wikipedia)	brotli	brotli -q 11	106759 bytes	-17730 bytes (-14.24%)
LZMA2 (Wikipedia)	xz	xz -9	107220 bytes	-17269 bytes (-13.87%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	111227 bytes	-13262 bytes (-10.65%)
Zstandard (Wikipedia)	zstd	zstd -19	113387 bytes	-11102 bytes (-8.92%)

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

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