AngularJS 0.9.15 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 329760 bytes (322.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 61081 bytes (59.6k, 19%).

After GZIP compression these minified files vary in size:

Boot	27613 bytes (27.0k)	CDN
Baidu	24894 bytes (24.3k)	CDN
cdnjs	24831 bytes (24.2k)	CDN
gzip -6 (default)	24709 bytes (24.1k)	local copy
gzip -9	24656 bytes (24.1k)	local copy
libdeflate -12	24070 bytes (23.5k)	local copy
7zip -mx=9 -tgzip	23807 bytes (23.2k)	local copy
kzip -s0 -rn -b4	23674 bytes (23.1k)	local copy
zultra	23669 bytes (23.1k)	local copy
pigz -11 -n	23643 bytes (23.1k)	local copy
Zopfli	23617 bytes (23.1k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-0.9.15.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 0.9.15 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 1214 bytes by using my AngularJS 0.9.15 Zopfli version instead of the best available CDN (5.14% smaller than cdnjs, 23617 vs. 24831 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 --mls32 --bsr30 --lazy --ohh

(found February 8, 2016)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	32	--mls32
block splitting recursion	30	--bsr30
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/0.9.15/angular-0.9.15.min.js --location | md5sum
510ec84ff4ef045e3a2a95ef81496088 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.15.min.zopfli.js.gz | md5sum
510ec84ff4ef045e3a2a95ef81496088 -

SHA1:
curl --silent --compressed https://code.angularjs.org/0.9.15/angular-0.9.15.min.js --location | sha1sum
693b0ee107e1fa7379417ed0103889983b984051 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.15.min.zopfli.js.gz | sha1sum
693b0ee107e1fa7379417ed0103889983b984051 -

These CDNs send you the original file:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	27613 bytes	510ec84ff4ef045e3a2a95ef81496088	March 18, 2015 @ 10:03
cdnjs	24831 bytes	510ec84ff4ef045e3a2a95ef81496088	March 28, 2014 @ 14:15

And some CDNs send you a different file:

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
Baidu	24894 bytes	24fb6d18463bbe1dd60e72e11bc00be5	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
23617 bytes	-1 byte	zopfli --i100000 --mls32 --bsr30 --lazy --ohh	February 8, 2016 @ 11:39
23618 bytes	-1 byte	zopfli --i10000 --mls8 --bsr8 --lazy --ohh	October 21, 2015 @ 12:55
23619 bytes	-1 byte	zopfli --i1000 --mls8 --bsr14 --lazy --ohh	September 20, 2015 @ 17:35
23620 bytes	-1 byte	zopfli --i1000 --mls256 --bsr7 --lazy --ohh	September 17, 2015 @ 02:38
23621 bytes	-4 bytes	zopfli --i1000 --mls512 --bsr10 --lazy --ohh	September 7, 2015 @ 22:08
23625 bytes	–	zopfli --i100 --mls8192 --bsr10 --lazy --ohh	September 7, 2015 @ 16:20

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 @ 12:52.

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	23648	23649	23648	23649	23646	23640	23638	23638	23645	23666	23665	23653	23656	23649	23672
4	23622	23623	23620	23619	23619	23620	23622	23620	23640	23626	23636	23622	23631	23632	23648
6	23628	23626	23621	23618	23623	23632	23631	23648	23635	23625	23622	23620	23647	23639	23651
7	23628	23627	23620	23620	23628	23620	23626	23619	23625	23624	23621	23621	23631	23628	23660
8	23620	23620	23617	23619	23619	23622	23627	23631	23624	23624	23640	23621	23636	23628	23648
9	23620	23629	23629	23619	23622	23622	23624	23620	23623	23626	23620	23624	23635	23628	23646
10	23620	23619	23617	23617	23617	23620	23619	23619	23620	23623	23621	23620	23620	23628	23645
11	23631	23631	23629	23620	23631	23633	23637	23626	23633	23646	23623	23620	23633	23628	23648
12	23621	23621	23619	23619	23621	23621	23619	23622	23626	23625	23625	23624	23636	23631	23634
13	23620	23620	23617	23622	23620	23620	23623	23620	23630	23628	23625	23621	23636	23632	23650
14	23620	23634	23617	23619	23619	23622	23646	23646	23645	23633	23622	23621	23626	23633	23648
15	23620	23629	23619	23627	23628	23626	23621	23623	23625	23628	23623	23621	23637	23628	23636
16	23631	23634	23637	23617	23620	23629	23628	23624	23623	23624	23624	23626	23633	23628	23640
17	23620	23619	23617	23617	23620	23620	23619	23620	23624	23645	23621	23633	23621	23628	23648
18	23621	23620	23620	23620	23617	23623	23620	23620	23624	23626	23620	23624	23638	23627	23638
19	23639	23621	23622	23621	23620	23620	23621	23628	23626	23624	23619	23621	23636	23633	23645
20	23624	23621	23620	23617	23622	23617	23620	23620	23645	23625	23623	23632	23639	23629	23639
21	23621	23619	23621	23620	23622	23624	23622	23620	23626	23624	23624	23620	23634	23628	23649
22	23620	23640	23634	23618	23619	23621	23636	23620	23624	23626	23619	23626	23636	23630	23652
23	23621	23625	23620	23620	23619	23620	23624	23622	23624	23623	23623	23621	23636	23632	23641
25	23621	23621	23618	23621	23619	23620	23623	23620	23622	23626	23623	23620	23631	23627	23648
30	23620	23631	23617	23618	23617	23620	23620	23620	23623	23625	23622	23625	23634	23633	23637
40	23620	23620	23618	23618	23621	23620	23620	23620	23623	23624	23628	23623	23639	23629	23643

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	23623 bytes	–	100%
1,000	23619 bytes	-4 bytes	100%
10,000	23618 bytes	-1 byte	100%
100,000	23617 bytes	-1 byte	5.80%
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)	23704 bytes	+87 bytes (+0.37%)	+30 bytes
1	24148 bytes	+531 bytes (+2.25%)	+474 bytes
2	23704 bytes	+87 bytes (+0.37%)	+30 bytes
3	23721 bytes	+104 bytes (+0.44%)	+47 bytes
4	23674 bytes	+57 bytes (+0.24%)	–
5	23701 bytes	+84 bytes (+0.36%)	+27 bytes
6	23736 bytes	+119 bytes (+0.50%)	+62 bytes
7	23755 bytes	+138 bytes (+0.58%)	+81 bytes
8	23776 bytes	+159 bytes (+0.67%)	+102 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	20705 bytes	-2912 bytes (-12.33%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	21067 bytes	-2550 bytes (-10.80%)
Brotli (Wikipedia)	brotli	brotli -q 11	21877 bytes	-1740 bytes (-7.37%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	22189 bytes	-1428 bytes (-6.05%)
LZMA2 (Wikipedia)	xz	xz -9	23196 bytes	-421 bytes (-1.78%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	23584 bytes	-33 bytes (-0.14%)
Zstandard (Wikipedia)	zstd	zstd -19	23881 bytes	+264 bytes (+1.12%)

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.