AngularJS 1.5.1 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1134714 bytes (1,108.1k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 155092 bytes (151.5k, 14%).

After GZIP compression these minified files vary in size:

Boot	62983 bytes (61.5k)	CDN
cdnjs	55249 bytes (54.0k)	CDN
gzip -6 (default)	54881 bytes (53.6k)	local copy
unpkg	54877 bytes (53.6k)	CDN
Google	54823 bytes (53.5k)	CDN
gzip -9	54771 bytes (53.5k)	local copy
7zip -mx=9 -tgzip	53090 bytes (51.8k)	local copy
libdeflate -12	53059 bytes (51.8k)	local copy
kzip -s0 -rn -b1	53057 bytes (51.8k)	local copy
zultra	53027 bytes (51.8k)	local copy
pigz -11 -n	52979 bytes (51.7k)	local copy
Zopfli	52923 bytes (51.7k)	local copy
Zopfli (defluff)	52921 bytes (51.7k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.5.1.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 1.5.1 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 1900 bytes by using my AngularJS 1.5.1 Zopfli version instead of the best available CDN (3.59% smaller than Google, 52923 vs. 54823 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 --mls4 --bsr10 --lazy --ohh

(found March 17, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4	--mls4
block splitting recursion	10	--bsr10
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 2 more bytes (52921 bytes).

Download

Verify file integrity

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

MD5:
curl --silent --compressed https://code.angularjs.org/1.5.1/angular.min.js --location | md5sum
5f237a436935dfc447a0cabc84f9eb3d -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.5.1.min.zopfli.js.gz | md5sum
5f237a436935dfc447a0cabc84f9eb3d -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.5.1/angular.min.js --location | sha1sum
68bd9c1480a2f27027eda702d3eb562a27e31921 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.5.1.min.zopfli.js.gz | sha1sum
68bd9c1480a2f27027eda702d3eb562a27e31921 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	62983 bytes	5f237a436935dfc447a0cabc84f9eb3d	May 3, 2016 @ 10:30
cdnjs	55249 bytes	5f237a436935dfc447a0cabc84f9eb3d	March 19, 2016 @ 13:46
unpkg	54877 bytes	5f237a436935dfc447a0cabc84f9eb3d	July 11, 2016 @ 15:52
Google	54823 bytes	5f237a436935dfc447a0cabc84f9eb3d	March 16, 2016 @ 20:07

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
52923 bytes	-3 bytes	zopfli --i1000000 --mls4 --bsr10 --lazy --ohh	March 17, 2016 @ 23:51
52926 bytes	-3 bytes	zopfli --i100000 --mls4 --bsr10 --lazy --ohh	March 17, 2016 @ 12:00
52929 bytes	-4 bytes	zopfli --i10000 --mls8 --bsr8 --lazy --ohh	March 17, 2016 @ 10:25
52933 bytes	-1 byte	zopfli --i1000 --mls8 --bsr8 --lazy --ohh	March 17, 2016 @ 10:15
52934 bytes	-15 bytes	zopfli --i1000 --mls4 --bsr10 --lazy --ohh	March 17, 2016 @ 10:14
52949 bytes	-5 bytes	zopfli --i1000 --mls1024 --bsr14 --lazy --ohh	March 17, 2016 @ 10:12
52954 bytes	–	zopfli --i100 --mls1024 --bsr14 --lazy --ohh	March 17, 2016 @ 10:07

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 @ 12:51.

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	52986	52986	52985	52988	52988	52990	52990	52977	52973	52987	52988	52981	52987	52988	52987
4	52961	52948	52979	52961	52969	52963	52969	52962	52957	52969	52959	52972	52971	52960	52961
6	52953	52954	52954	52965	52963	52970	52958	52959	52970	52958	52962	52969	52964	52957	52956
7	52970	52971	52982	52977	52967	52971	52959	52964	52965	52959	52961	52977	52959	52960	52958
8	52954	52956	52927	52965	52947	52962	52966	52968	52957	52948	52960	52965	52977	52960	52962
9	52955	52955	52979	52975	52960	52963	52962	52968	52957	52946	52963	52958	52957	52958	52961
10	52956	52923	52938	52959	52960	52957	52964	52963	52959	52947	52953	52959	52962	52958	52962
11	52956	52956	52973	52970	52969	52956	52967	52965	52951	52954	52953	52958	52956	52957	52955
12	52955	52969	52981	52962	52964	52958	52965	52968	52958	52946	52953	52956	52960	52959	52958
13	52955	52955	52981	52961	52962	52956	52964	52963	52961	52947	52953	52958	52963	52960	52959
14	52961	52955	52964	52969	52965	52956	52963	52959	52957	52946	52968	52958	52963	52958	52961
15	52971	52971	52980	52961	52964	52956	52964	52964	52963	52952	52954	52960	52957	52961	52959
16	52971	52950	52979	52977	52968	52956	52965	52970	52967	52957	52959	52957	52962	52949	52958
17	52956	52956	52936	52965	52949	52957	52963	52968	52959	52947	52950	52959	52958	52957	52959
18	52971	52971	52948	52965	52955	52956	52964	52966	52957	52945	52959	52956	52958	52957	52961
19	52960	52975	52981	52982	52965	52958	52966	52963	52957	52950	52956	52958	52958	52957	52957
20	52955	52957	52935	52960	52965	52956	52963	52968	52957	52945	52959	52959	52958	52961	52961
21	52956	52956	52936	52961	52965	52956	52962	52964	52964	52947	52959	52959	52963	52960	52961
22	52970	52956	52934	52961	52953	52956	52962	52963	52957	52945	52952	52958	52960	52960	52957
23	52955	52956	52972	52966	52967	52957	52962	52968	52959	52946	52953	52959	52958	52957	52955
25	52956	52956	52956	52957	52952	52957	52963	52970	52957	52948	52956	52959	52962	52959	52950
30	52947	52945	52960	52956	52957	52957	52964	52969	52958	52958	52953	52956	52958	52941	52950
40	52946	52948	52969	52953	52949	52940	52943	52960	52961	52947	52964	52958	52959	52956	52958

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	52954 bytes	–	100%
1,000	52933 bytes	-21 bytes	100%
10,000	52929 bytes	-4 bytes	100%
100,000	52926 bytes	-3 bytes	0.58%
1,000,000	52923 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)	53069 bytes	+146 bytes (+0.28%)	+12 bytes
1	53057 bytes	+134 bytes (+0.25%)	–
2	53078 bytes	+155 bytes (+0.29%)	+21 bytes
3	53085 bytes	+162 bytes (+0.31%)	+28 bytes
4	53102 bytes	+179 bytes (+0.34%)	+45 bytes
5	53109 bytes	+186 bytes (+0.35%)	+52 bytes
6	53116 bytes	+193 bytes (+0.36%)	+59 bytes
7	53098 bytes	+175 bytes (+0.33%)	+41 bytes
8	53125 bytes	+202 bytes (+0.38%)	+68 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	41029 bytes	-11894 bytes (-22.47%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	43414 bytes	-9509 bytes (-17.97%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	44792 bytes	-8131 bytes (-15.36%)
Brotli (Wikipedia)	brotli	brotli -q 11	48097 bytes	-4826 bytes (-9.12%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	48939 bytes	-3984 bytes (-7.53%)
LZMA2 (Wikipedia)	xz	xz -9	49636 bytes	-3287 bytes (-6.21%)
Zstandard (Wikipedia)	zstd	zstd -19	51095 bytes	-1828 bytes (-3.45%)

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.