AngularJS 0.9.4 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 252215 bytes (246.3k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 58604 bytes (57.2k, 23%).

After GZIP compression these minified files vary in size:

Boot	26681 bytes (26.1k)	CDN
Baidu	24109 bytes (23.5k)	CDN
cdnjs	24045 bytes (23.5k)	CDN
gzip -6 (default)	23970 bytes (23.4k)	local copy
gzip -9	23937 bytes (23.4k)	local copy
libdeflate -12	23349 bytes (22.8k)	local copy
7zip -mx=9 -tgzip	23070 bytes (22.5k)	local copy
zultra	23016 bytes (22.5k)	local copy
kzip -s0 -rn -b3	22975 bytes (22.4k)	local copy
pigz -11 -n	22965 bytes (22.4k)	local copy
Zopfli	22947 bytes (22.4k)	local copy
Zopfli (defluff)	22946 bytes (22.4k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-0.9.4.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 0.9.4 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 1098 bytes by using my AngularJS 0.9.4 Zopfli version instead of the best available CDN (4.78% smaller than cdnjs, 22947 vs. 24045 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 --mls4096 --bsr25 --lazy --ohh

(found February 4, 2016)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	4096	--mls4096
block splitting recursion	25	--bsr25
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 1 more byte (22946 bytes).

Download

Verify file integrity

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

MD5:
curl --silent --compressed https://code.angularjs.org/0.9.4/angular-0.9.4.min.js --location | md5sum
fb648bc83c860bb330b0d28c9b85e679 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.4.min.zopfli.js.gz | md5sum
fb648bc83c860bb330b0d28c9b85e679 -

SHA1:
curl --silent --compressed https://code.angularjs.org/0.9.4/angular-0.9.4.min.js --location | sha1sum
10c7399077eeed7160042e2680cc932752659ce3 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.4.min.zopfli.js.gz | sha1sum
10c7399077eeed7160042e2680cc932752659ce3 -

These CDNs send you the original file:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	26681 bytes	fb648bc83c860bb330b0d28c9b85e679	March 18, 2015 @ 10:05
cdnjs	24045 bytes	fb648bc83c860bb330b0d28c9b85e679	March 28, 2014 @ 14:15

And some CDNs send you a different file:

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
Baidu	24109 bytes	70b26f51d0baef2f053c02b1603c0e37	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
22947 bytes	-1 byte	zopfli --i100000 --mls4096 --bsr25 --lazy --ohh	February 4, 2016 @ 21:36
22948 bytes	-1 byte	zopfli --i10000 --mls4096 --bsr9 --lazy --ohh	February 4, 2016 @ 12:24
22949 bytes	-1 byte	zopfli --i10000 --mls64 --bsr22 --lazy --ohh	October 14, 2015 @ 12:17
22950 bytes	-1 byte	zopfli --i1000 --mls4096 --bsr11 --lazy --ohh	September 7, 2015 @ 21:49
22951 bytes	-1 byte	zopfli --i1000 --mls8192 --bsr4 --lazy --ohh	September 7, 2015 @ 21:48
22952 bytes	-1 byte	zopfli --i1000 --mls2048 --bsr14 --lazy --ohh	September 7, 2015 @ 21:44
22953 bytes	-4 bytes	zopfli --i1000 --mls512 --bsr10 --lazy --ohh	September 7, 2015 @ 21:42
22957 bytes	-2 bytes	zopfli --i1000 --mls512 --bsr6 --lazy --ohh	September 7, 2015 @ 21:42
22959 bytes	–	zopfli --i100 --mls8192 --bsr8 --lazy --ohh	September 7, 2015 @ 16:11

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 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	22969	22968	22966	22960	22962	22968	22968	22970	22979	22985	22982	22979	22977	22980	22976
4	22950	22953	22949	22977	22977	22975	22972	22968	22961	22963	22958	22964	22949	22973	22980
6	22953	22958	22956	22965	22966	22965	22971	22953	22955	22952	22960	22958	22953	22967	22962
7	22959	22958	22951	22955	22950	22955	22951	22952	22964	22961	22952	22950	22965	22964	22973
8	22953	22953	22954	22957	22956	22961	22963	22960	22963	22958	22959	22951	22948	22965	22965
9	22955	22952	22960	22953	22953	22956	22953	22960	22960	22951	22947	22948	22951	22963	22967
10	22956	22951	22951	22951	22952	22956	22950	22952	22951	22954	22956	22952	22950	22958	22965
11	22957	22950	22951	22951	22950	22951	22950	22958	22953	22947	22950	22948	22950	22957	22956
12	22952	22951	22955	22952	22955	22956	22951	22952	22960	22954	22958	22950	22951	22957	22965
13	22954	22953	22949	22953	22952	22952	22951	22956	22954	22958	22953	22951	22951	22965	22969
14	22954	22951	22951	22952	22954	22949	22951	22954	22954	22954	22950	22955	22965	22956	22966
15	22964	22958	22958	22955	22952	22951	22950	22952	22951	22956	22950	22952	22963	22958	22964
16	22954	22953	22951	22951	22952	22958	22960	22951	22967	22953	22951	22954	22951	22958	22964
17	22959	22954	22949	22953	22952	22956	22950	22957	22953	22955	22953	22952	22951	22963	22967
18	22955	22951	22951	22953	22951	22951	22955	22952	22954	22951	22950	22953	22952	22959	22968
19	22955	22954	22955	22953	22952	22955	22951	22953	22953	22956	22950	22950	22952	22959	22967
20	22955	22954	22951	22952	22954	22953	22952	22953	22954	22955	22951	22950	22959	22963	22968
21	22954	22952	22952	22954	22952	22952	22952	22953	22954	22953	22952	22951	22955	22960	22967
22	22953	22956	22951	22953	22953	22949	22955	22953	22954	22955	22953	22959	22958	22958	22968
23	22953	22953	22950	22951	22955	22951	22951	22953	22953	22954	22950	22948	22952	22963	22967
25	22956	22955	22951	22950	22954	22956	22951	22952	22954	22954	22952	22947	22958	22958	22968
30	22962	22962	22948	22953	22952	22949	22951	22953	22953	22951	22953	22950	22951	22958	22964
40	22953	22955	22951	22953	22950	22955	22951	22950	22953	22952	22951	22952	22951	22958	22965

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	22959 bytes	–	100%
1,000	22950 bytes	-9 bytes	100%
10,000	22948 bytes	-2 bytes	100%
100,000	22947 bytes	-1 byte	4.35%
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)	23035 bytes	+88 bytes (+0.38%)	+60 bytes
1	23441 bytes	+494 bytes (+2.15%)	+466 bytes
2	23038 bytes	+91 bytes (+0.40%)	+63 bytes
3	22975 bytes	+28 bytes (+0.12%)	–
4	22989 bytes	+42 bytes (+0.18%)	+14 bytes
5	23003 bytes	+56 bytes (+0.24%)	+28 bytes
6	23038 bytes	+91 bytes (+0.40%)	+63 bytes
7	23068 bytes	+121 bytes (+0.53%)	+93 bytes
8	23081 bytes	+134 bytes (+0.58%)	+106 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	20165 bytes	-2782 bytes (-12.12%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	20680 bytes	-2267 bytes (-9.88%)
Brotli (Wikipedia)	brotli	brotli -q 11	21314 bytes	-1633 bytes (-7.12%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	21696 bytes	-1251 bytes (-5.45%)
LZMA2 (Wikipedia)	xz	xz -9	22544 bytes	-403 bytes (-1.76%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	23177 bytes	+230 bytes (+1.00%)
Zstandard (Wikipedia)	zstd	zstd -19	23201 bytes	+254 bytes (+1.11%)

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.