AngularJS 1.6.1 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1232632 bytes (1,203.7k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 166022 bytes (162.1k, 13%).

After GZIP compression these minified files vary in size:

Boot	66961 bytes (65.4k)	CDN
cdnjs	58451 bytes (57.1k)	CDN
Google	58281 bytes (56.9k)	CDN
unpkg	57999 bytes (56.6k)	CDN
gzip -6 (default)	57995 bytes (56.6k)	local copy
gzip -9	57873 bytes (56.5k)	local copy
7zip -mx=9 -tgzip	56110 bytes (54.8k)	local copy
kzip -s0 -rn -b0	56094 bytes (54.8k)	local copy
libdeflate -12	56092 bytes (54.8k)	local copy
zultra	56060 bytes (54.7k)	local copy
pigz -11 -n	56023 bytes (54.7k)	local copy
Zopfli	55966 bytes (54.7k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.6.1.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 1.6.1 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 2033 bytes by using my AngularJS 1.6.1 Zopfli version instead of the best available CDN (3.63% smaller than unpkg, 55966 vs. 57999 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 --mls1024 --bsr21 --lazy --ohh

(found December 26, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	1024	--mls1024
block splitting recursion	21	--bsr21
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/1.6.1/angular.min.js --location | md5sum
ed0ac421e5a640435b2900389405ccc6 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.6.1.min.zopfli.js.gz | md5sum
ed0ac421e5a640435b2900389405ccc6 -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.6.1/angular.min.js --location | sha1sum
d1592f45531b8c471048606c1b1607f69034d4d9 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.6.1.min.zopfli.js.gz | sha1sum
d1592f45531b8c471048606c1b1607f69034d4d9 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	66961 bytes	ed0ac421e5a640435b2900389405ccc6	December 23, 2016 @ 20:03
cdnjs	58451 bytes	ed0ac421e5a640435b2900389405ccc6	December 23, 2016 @ 13:32
Google	58281 bytes	ed0ac421e5a640435b2900389405ccc6	December 24, 2016 @ 12:15
unpkg	57999 bytes	ed0ac421e5a640435b2900389405ccc6	December 26, 2016 @ 07:33

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
55966 bytes	-2 bytes	zopfli --i1000000 --mls1024 --bsr21 --lazy --ohh	December 26, 2016 @ 23:41
55968 bytes	-5 bytes	zopfli --i100000 --mls1024 --bsr21 --lazy --ohh	December 26, 2016 @ 08:58
55973 bytes	-1 byte	zopfli --i10000 --mls1024 --bsr21 --lazy --ohh	December 26, 2016 @ 07:57
55974 bytes	-3 bytes	zopfli --i10000 --mls1024 --bsr15 --lazy --ohh	December 26, 2016 @ 07:52
55977 bytes	-1 byte	zopfli --i1000 --mls1024 --bsr22 --lazy --ohh	December 26, 2016 @ 07:50
55978 bytes	-1 byte	zopfli --i1000 --mls1024 --bsr15 --lazy --ohh	December 26, 2016 @ 07:45
55979 bytes	-4 bytes	zopfli --i1000 --mls256 --bsr12 --lazy --ohh	December 26, 2016 @ 07:45
55983 bytes	–	zopfli --i100 --mls256 --bsr12 --lazy --ohh	December 26, 2016 @ 07:35

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	56020	56021	56019	56020	56021	56021	56015	56014	56013	56022	56017	56000	56003	56000	56018
4	56007	56009	56007	56011	55992	56004	55997	55986	56005	55995	55984	55986	55994	55992	55995
6	56013	56011	56005	56006	56002	56003	55995	55989	55987	55995	55994	55996	55995	55994	55995
7	56018	56001	56006	56001	56003	55998	55993	56007	55982	55991	55986	55994	56007	55989	55999
8	56001	56001	56004	56005	55994	55999	55983	55985	55996	56001	55984	55989	56004	55986	55996
9	56011	56010	56000	56004	55995	55999	55995	55990	55999	55984	55996	55996	55996	55994	56002
10	56005	56008	55998	56006	56001	55987	55984	55984	55974	55986	55973	55996	55998	55991	55992
11	55993	55993	55995	55998	55991	55991	55981	55985	55980	55985	55986	55996	55984	55991	55999
12	56005	56005	56004	56005	55988	55990	55987	55975	55975	55986	55974	55996	55989	55992	56001
13	56003	55996	55993	56005	55997	56000	55984	55977	55974	55986	55984	55996	56001	55981	55990
14	55998	56001	56002	56006	55997	55981	55979	55985	55976	55976	55975	55996	56003	55998	56002
15	56005	56003	56001	56004	55995	55995	56002	55988	55970	55974	55985	55996	56004	55983	56007
16	55994	55993	55995	56004	55995	55984	55986	55986	55976	55973	55988	55996	55998	55992	55997
17	55994	56009	55989	56001	55993	55990	55979	55984	55979	55979	55982	55990	56006	55995	55995
18	56005	55995	56005	56000	55986	55994	55984	55989	55979	55974	55982	55984	56001	55993	55996
19	55994	56003	56004	55997	55989	55990	55981	55990	55976	55966	55982	55996	56006	55981	56001
20	56001	56012	55996	56001	55995	55990	55974	55993	55976	55979	55985	55996	56004	55993	55997
21	56008	56001	55999	56001	55986	56006	55983	55984	55976	55966	55973	55983	55998	55992	56000
22	56002	55994	55991	56005	55998	55990	55975	55984	55974	55974	55974	55996	55998	55991	55998
23	56013	56002	55992	56003	55997	55991	55984	55975	55976	55974	55973	55985	56006	55979	56001
25	55998	55993	55990	56000	55995	55990	55985	55978	55980	55994	55985	55995	56001	55989	56000
30	55998	55999	55993	55996	55985	55989	55983	55985	55976	55983	55978	55995	55996	55993	56002
40	56000	55999	55995	55988	55981	55986	55969	55970	55975	55974	55973	55983	55998	55983	55998

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	55983 bytes	–	100%
1,000	55977 bytes	-6 bytes	100%
10,000	55971 bytes	-6 bytes	100%
100,000	55968 bytes	-3 bytes	1.45%
1,000,000	55966 bytes	-2 bytes	0.58%
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)	56094 bytes	+128 bytes (+0.23%)	–
1	56097 bytes	+131 bytes (+0.23%)	+3 bytes
2	56101 bytes	+135 bytes (+0.24%)	+7 bytes
3	56120 bytes	+154 bytes (+0.28%)	+26 bytes
4	56133 bytes	+167 bytes (+0.30%)	+39 bytes
5	56126 bytes	+160 bytes (+0.29%)	+32 bytes
6	56135 bytes	+169 bytes (+0.30%)	+41 bytes
7	56155 bytes	+189 bytes (+0.34%)	+61 bytes
8	56165 bytes	+199 bytes (+0.36%)	+71 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	43217 bytes	-12749 bytes (-22.78%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	45718 bytes	-10248 bytes (-18.31%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	47358 bytes	-8608 bytes (-15.38%)
Brotli (Wikipedia)	brotli	brotli -q 11	50725 bytes	-5241 bytes (-9.36%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	51612 bytes	-4354 bytes (-7.78%)
LZMA2 (Wikipedia)	xz	xz -9	52304 bytes	-3662 bytes (-6.54%)
Zstandard (Wikipedia)	zstd	zstd -19	53823 bytes	-2143 bytes (-3.83%)

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.