AngularJS 0.9.18 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 369287 bytes (360.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 66007 bytes (64.5k, 18%).

After GZIP compression these minified files vary in size:

Boot	30026 bytes (29.3k)	CDN
Baidu	26918 bytes (26.3k)	CDN
cdnjs	26833 bytes (26.2k)	CDN
gzip -6 (default)	26688 bytes (26.1k)	local copy
gzip -9	26633 bytes (26.0k)	local copy
libdeflate -12	26260 bytes (25.6k)	local copy
7zip -mx=9 -tgzip	25904 bytes (25.3k)	local copy
zultra	25866 bytes (25.3k)	local copy
pigz -11 -n	25839 bytes (25.2k)	local copy
kzip -s0 -rn -b3	25834 bytes (25.2k)	local copy
Zopfli	25810 bytes (25.2k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-0.9.18.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 0.9.18 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 1023 bytes by using my AngularJS 0.9.18 Zopfli version instead of the best available CDN (3.96% smaller than cdnjs, 25810 vs. 26833 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 --mls8 --bsr13 --lazy --ohh

(found November 26, 2015)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	8	--mls8
block splitting recursion	13	--bsr13
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/0.9.18/angular-0.9.18.min.js --location | md5sum
df99c4ba0bbae8935e8a3fdf06be8404 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.18.min.zopfli.js.gz | md5sum
df99c4ba0bbae8935e8a3fdf06be8404 -

SHA1:
curl --silent --compressed https://code.angularjs.org/0.9.18/angular-0.9.18.min.js --location | sha1sum
5ddac40e3d0286c00b148d5682f251eb89d9dfae -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.18.min.zopfli.js.gz | sha1sum
5ddac40e3d0286c00b148d5682f251eb89d9dfae -

These CDNs send you the original file:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	30026 bytes	df99c4ba0bbae8935e8a3fdf06be8404	March 18, 2015 @ 10:04
cdnjs	26833 bytes	df99c4ba0bbae8935e8a3fdf06be8404	January 24, 2014 @ 03:45

And some CDNs send you a different file:

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
Baidu	26918 bytes	3e372941682783c7dea83bebbee49b6c	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
25810 bytes	-1 byte	zopfli --i100000 --mls8 --bsr13 --lazy --ohh	November 26, 2015 @ 12:02
25811 bytes	-1 byte	zopfli --i10000 --mls8 --bsr13 --lazy --ohh	November 26, 2015 @ 11:36
25812 bytes	-2 bytes	zopfli --i10000 --mls2048 --bsr9 --lazy --ohh	September 11, 2015 @ 07:37
25814 bytes	-1 byte	zopfli --i1000 --mls2048 --bsr9 --lazy --ohh	September 7, 2015 @ 22:01
25815 bytes	-2 bytes	zopfli --i1000 --mls2048 --bsr10 --lazy --ohh	September 7, 2015 @ 21:58
25817 bytes	–	zopfli --i100 --mls4096 --bsr11 --lazy --ohh	September 7, 2015 @ 16:10

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	25833	25835	25831	25830	25828	25829	25832	25834	25841	25849	25852	25863	25836	25840	25847
4	25842	25832	25825	25813	25813	25826	25812	25815	25822	25830	25828	25812	25834	25824	25843
6	25812	25812	25813	25813	25814	25821	25813	25824	25824	25826	25830	25831	25830	25840	25837
7	25812	25815	25812	25812	25823	25824	25822	25823	25815	25817	25822	25815	25828	25823	25826
8	25813	25812	25814	25819	25832	25824	25827	25838	25843	25837	25813	25812	25829	25822	25818
9	25813	25813	25837	25813	25823	25825	25814	25814	25839	25825	25812	25812	25824	25821	25817
10	25814	25812	25812	25812	25814	25826	25812	25826	25825	25828	25813	25812	25827	25823	25826
11	25814	25819	25812	25824	25822	25825	25826	25826	25827	25825	25813	25812	25825	25822	25817
12	25812	25813	25814	25815	25814	25824	25825	25826	25827	25830	25828	25813	25828	25823	25824
13	25812	25812	25810	25813	25813	25813	25814	25824	25826	25814	25824	25812	25828	25823	25823
14	25812	25828	25816	25813	25822	25812	25813	25812	25824	25824	25815	25812	25827	25818	25830
15	25812	25828	25824	25825	25821	25826	25824	25826	25825	25827	25823	25812	25834	25822	25825
16	25813	25812	25813	25811	25810	25812	25812	25813	25826	25830	25826	25812	25826	25840	25826
17	25812	25812	25812	25812	25823	25813	25810	25818	25830	25825	25814	25815	25827	25822	25833
18	25837	25826	25834	25837	25810	25825	25825	25824	25826	25827	25812	25827	25826	25822	25815
19	25812	25812	25813	25830	25823	25824	25814	25825	25826	25825	25824	25827	25828	25822	25819
20	25813	25812	25812	25813	25824	25812	25824	25825	25825	25813	25815	25813	25827	25822	25829
21	25813	25828	25813	25812	25812	25825	25813	25825	25826	25825	25813	25812	25827	25822	25817
22	25812	25814	25813	25814	25812	25827	25826	25826	25827	25826	25812	25814	25827	25823	25819
23	25827	25827	25828	25823	25823	25826	25825	25825	25826	25825	25813	25813	25827	25823	25818
25	25813	25812	25813	25813	25812	25812	25811	25812	25826	25812	25813	25812	25834	25821	25826
30	25812	25813	25812	25821	25812	25826	25825	25825	25826	25825	25812	25828	25827	25823	25816
40	25812	25812	25812	25811	25821	25825	25813	25813	25826	25814	25812	25813	25827	25822	25818

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	25816 bytes	–	100%
1,000	25813 bytes	-3 bytes	100%
10,000	25811 bytes	-2 bytes	100%
100,000	25810 bytes	-1 byte	2.03%
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)	25882 bytes	+72 bytes (+0.28%)	+48 bytes
1	26323 bytes	+513 bytes (+1.99%)	+489 bytes
2	25882 bytes	+72 bytes (+0.28%)	+48 bytes
3	25834 bytes	+24 bytes (+0.09%)	–
4	25853 bytes	+43 bytes (+0.17%)	+19 bytes
5	25875 bytes	+65 bytes (+0.25%)	+41 bytes
6	25904 bytes	+94 bytes (+0.36%)	+70 bytes
7	25923 bytes	+113 bytes (+0.44%)	+89 bytes
8	25958 bytes	+148 bytes (+0.57%)	+124 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	22491 bytes	-3319 bytes (-12.86%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	23057 bytes	-2753 bytes (-10.67%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	23108 bytes	-2702 bytes (-10.47%)
Brotli (Wikipedia)	brotli	brotli -q 11	23861 bytes	-1949 bytes (-7.55%)
LZMA2 (Wikipedia)	xz	xz -9	25212 bytes	-598 bytes (-2.32%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	25725 bytes	-85 bytes (-0.33%)
Zstandard (Wikipedia)	zstd	zstd -19	25983 bytes	+173 bytes (+0.67%)

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.