AngularJS 0.9.2 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 156336 bytes (152.7k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 58494 bytes (57.1k, 37%).

After GZIP compression these minified files vary in size:

Boot	26417 bytes (25.8k)	CDN
Baidu	23870 bytes (23.3k)	CDN
cdnjs	23810 bytes (23.3k)	CDN
gzip -6 (default)	23736 bytes (23.2k)	local copy
gzip -9	23694 bytes (23.1k)	local copy
libdeflate -12	23081 bytes (22.5k)	local copy
7zip -mx=9 -tgzip	22798 bytes (22.3k)	local copy
zultra	22746 bytes (22.2k)	local copy
pigz -11 -n	22689 bytes (22.2k)	local copy
kzip -s0 -rn -b3	22686 bytes (22.2k)	local copy
Zopfli	22651 bytes (22.1k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-0.9.2.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 0.9.2 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 1159 bytes by using my AngularJS 0.9.2 Zopfli version instead of the best available CDN (5.12% smaller than cdnjs, 22651 vs. 23810 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 --i100000 --mb8 --mls2 --bsr20 --lazy --ohh

(found February 4, 2016)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	2	--mls2
block splitting recursion	20	--bsr20
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

Verify file integrity

After decompression, my uncompressed files are identical to the original ones:

MD5:
curl --silent --compressed https://code.angularjs.org/0.9.2/angular-0.9.2.min.js --location | md5sum
b6b67b3d106896ee67b63ee0761a2a27 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.2.min.zopfli.js.gz | md5sum
b6b67b3d106896ee67b63ee0761a2a27 -

SHA1:
curl --silent --compressed https://code.angularjs.org/0.9.2/angular-0.9.2.min.js --location | sha1sum
8e07b92b0af630bda45ccae28095b0673688ad60 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.2.min.zopfli.js.gz | sha1sum
8e07b92b0af630bda45ccae28095b0673688ad60 -

These CDNs send you the original file:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	26417 bytes	b6b67b3d106896ee67b63ee0761a2a27	March 18, 2015 @ 10:05
cdnjs	23810 bytes	b6b67b3d106896ee67b63ee0761a2a27	March 28, 2014 @ 14:15

And some CDNs send you a different file:

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
Baidu	23870 bytes	892d327b5f2dc6744f74daeeec06a66b	only whitespaces differ	June 5, 2014 @ 10:05

Note: only the MD5 hashes are shown to keep things simple.

Other Versions

Available AngularJS versions at minime.stephan-brumme.com:

1.8.2, 1.8.1, 1.8.0,
1.7.9, 1.7.8, 1.7.7, 1.7.6, 1.7.5, 1.7.4, 1.7.3, 1.7.2, 1.7.1, 1.7.0,
1.6.10, 1.6.9, 1.6.8, 1.6.7, 1.6.6, 1.6.5, 1.6.4, 1.6.3, 1.6.2, 1.6.1, 1.6.0,
1.5.11, 1.5.10, 1.5.9, 1.5.8, 1.5.7, 1.5.6, 1.5.5, 1.5.4, 1.5.3, 1.5.2, 1.5.1, 1.5.0,
1.4.14, 1.4.13, 1.4.12, 1.4.11, 1.4.10, 1.4.9, 1.4.8, 1.4.7, 1.4.6, 1.4.5, 1.4.4, 1.4.3, 1.4.2, 1.4.1, 1.4.0,
1.3.20, 1.3.19, 1.3.18, 1.3.17, 1.3.16, 1.3.15, 1.3.14, 1.3.13, 1.3.12, 1.3.11, 1.3.10, 1.3.9, 1.3.8, 1.3.7, 1.3.6, 1.3.5, 1.3.4, 1.3.3, 1.3.2, 1.3.1, 1.3.0,
1.2.32, 1.2.31, 1.2.30, 1.2.29, 1.2.28, 1.2.27, 1.2.26, 1.2.25, 1.2.24, 1.2.23, 1.2.22, 1.2.21, 1.2.20, 1.2.19, 1.2.18, 1.2.17, 1.2.16, 1.2.15, 1.2.14, 1.2.13, 1.2.12, 1.2.11, 1.2.10, 1.2.9, 1.2.8, 1.2.7, 1.2.6, 1.2.5, 1.2.4, 1.2.3, 1.2.2, 1.2.1, 1.2.0,
1.1.5, 1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1.0,
1.0.8, 1.0.7, 1.0.6, 1.0.5, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0,
0.10.6, 0.10.5, 0.10.4, 0.10.3, 0.10.2, 0.10.1, 0.10.0,
0.9.19, 0.9.18, 0.9.17, 0.9.16, 0.9.15, 0.9.14, 0.9.13, 0.9.12, 0.9.11, 0.9.10, 0.9.9, 0.9.8, 0.9.7, 0.9.6, 0.9.5, 0.9.4, 0.9.3, 0.9.2, 0.9.1, 0.9.0

The project site contains an overview how well these versions were compressed.
Other interesting projects are BackboneJS, Bootstrap, D3, Dojo, Ember, jQuery, Knockout, lodash, React, Socket.IO, ThreeJS, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:

Size	Improvement	Parameters	Found
22651 bytes	-1 byte	zopfli --i100000 --mls2 --bsr20 --lazy --ohh	February 4, 2016 @ 13:23
22652 bytes	-5 bytes	zopfli --i10000 --mls2 --bsr20 --lazy --ohh	November 26, 2015 @ 10:53
22657 bytes	-6 bytes	zopfli --i1000 --mls2 --bsr20 --lazy --ohh	September 24, 2015 @ 00:13
22663 bytes	-1 byte	zopfli --i1000 --mls8192 --bsr16 --lazy --ohh	September 7, 2015 @ 21:54
22664 bytes	-1 byte	zopfli --i1000 --mls8192 --bsr11 --lazy --ohh	September 7, 2015 @ 21:54
22665 bytes	-1 byte	zopfli --i1000 --mls2048 --bsr11 --lazy --ohh	September 7, 2015 @ 21:53
22666 bytes	-1 byte	zopfli --i1000 --mls2048 --bsr8 --lazy --ohh	September 7, 2015 @ 21:52
22667 bytes	-1 byte	zopfli --i1000 --mls512 --bsr16 --lazy --ohh	September 7, 2015 @ 21:52
22668 bytes	-4 bytes	zopfli --i1000 --mls1024 --bsr6 --lazy --ohh	September 7, 2015 @ 21:52
22672 bytes	-2 bytes	zopfli --i1000 --mls512 --bsr10 --lazy --ohh	September 7, 2015 @ 21:51
22674 bytes	-1 byte	zopfli --i1000 --mls512 --bsr9 --lazy --ohh	September 7, 2015 @ 21:51
22675 bytes	–	zopfli --i100 --mls8192 --bsr14 --lazy --ohh	September 7, 2015 @ 16:05

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 @ 12:53.

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 or 100,000.

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	22691	22681	22694	22688	22689	22697	22698	22697	22711	22699	22694	22694	22700	22686	22697
4	22669	22664	22663	22695	22683	22689	22691	22671	22685	22669	22670	22671	22668	22695	22687
6	22699	22691	22703	22700	22680	22668	22664	22673	22670	22666	22663	22676	22666	22682	22676
7	22671	22665	22665	22666	22672	22677	22666	22687	22681	22667	22662	22676	22662	22677	22689
8	22683	22689	22689	22668	22666	22677	22681	22683	22699	22703	22662	22665	22665	22690	22689
9	22667	22666	22662	22666	22666	22666	22671	22668	22668	22667	22663	22666	22662	22679	22686
10	22677	22679	22667	22667	22669	22667	22669	22673	22669	22667	22665	22667	22662	22681	22683
11	22674	22667	22668	22664	22666	22663	22669	22669	22671	22667	22662	22665	22662	22681	22690
12	22666	22666	22667	22666	22669	22666	22668	22687	22669	22666	22663	22663	22663	22691	22682
13	22681	22663	22666	22666	22685	22688	22689	22689	22677	22672	22665	22665	22668	22687	22673
14	22680	22666	22665	22685	22673	22687	22687	22666	22668	22666	22667	22672	22662	22679	22685
15	22668	22669	22664	22663	22666	22666	22679	22673	22665	22667	22665	22662	22662	22683	22690
16	22671	22665	22666	22666	22666	22666	22667	22666	22664	22666	22666	22667	22662	22680	22684
17	22674	22666	22665	22666	22666	22687	22687	22669	22662	22666	22663	22665	22662	22684	22675
18	22684	22669	22665	22667	22667	22666	22667	22673	22671	22668	22663	22667	22662	22681	22674
19	22681	22668	22663	22666	22666	22664	22671	22671	22668	22666	22664	22668	22663	22682	22689
20	22651	22666	22666	22668	22667	22664	22668	22671	22663	22667	22664	22667	22663	22684	22678
21	22677	22666	22665	22666	22666	22667	22669	22674	22664	22668	22666	22665	22662	22683	22662
22	22679	22666	22666	22666	22682	22667	22668	22669	22670	22666	22668	22667	22662	22682	22689
23	22682	22667	22666	22667	22669	22667	22668	22673	22663	22666	22665	22665	22664	22682	22698
25	22674	22667	22685	22682	22681	22684	22671	22670	22669	22667	22662	22663	22662	22684	22675
30	22676	22677	22675	22682	22662	22666	22668	22667	22668	22668	22664	22665	22662	22681	22686
40	22680	22667	22663	22667	22666	22666	22667	22673	22668	22670	22664	22667	22666	22678	22675

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	22663 bytes	–	100%
1,000	22657 bytes	-6 bytes	100%
10,000	22652 bytes	-5 bytes	100%
100,000	22651 bytes	-1 byte	0.29%
1,000,000	–	–	–
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)	22746 bytes	+95 bytes (+0.42%)	+60 bytes
1	23151 bytes	+500 bytes (+2.21%)	+465 bytes
2	22746 bytes	+95 bytes (+0.42%)	+60 bytes
3	22686 bytes	+35 bytes (+0.15%)	–
4	22700 bytes	+49 bytes (+0.22%)	+14 bytes
5	22716 bytes	+65 bytes (+0.29%)	+30 bytes
6	22722 bytes	+71 bytes (+0.31%)	+36 bytes
7	22756 bytes	+105 bytes (+0.46%)	+70 bytes
8	22791 bytes	+140 bytes (+0.62%)	+105 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	19900 bytes	-2751 bytes (-12.15%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	20418 bytes	-2233 bytes (-9.86%)
Brotli (Wikipedia)	brotli	brotli -q 11	21035 bytes	-1616 bytes (-7.13%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	21475 bytes	-1176 bytes (-5.19%)
LZMA2 (Wikipedia)	xz	xz -9	22256 bytes	-395 bytes (-1.74%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	22889 bytes	+238 bytes (+1.05%)
Zstandard (Wikipedia)	zstd	zstd -19	22917 bytes	+266 bytes (+1.17%)

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 2026.
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.