AngularJS 1.2.23 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 780557 bytes (762.3k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 107098 bytes (104.6k, 14%).

After GZIP compression these minified files vary in size:

Boot	45243 bytes (44.2k)	CDN
cdnjs	39839 bytes (38.9k)	CDN
gzip -6 (default)	39602 bytes (38.7k)	local copy
gzip -9	39545 bytes (38.6k)	local copy
Google	39535 bytes (38.6k)	CDN
Yandex	39534 bytes (38.6k)	CDN
7zip -mx=9 -tgzip	38347 bytes (37.4k)	local copy
kzip -s0 -rn -b1	38333 bytes (37.4k)	local copy
pigz -11 -n	38314 bytes (37.4k)	local copy
libdeflate -12	38309 bytes (37.4k)	local copy
zultra	38307 bytes (37.4k)	local copy
Zopfli	38257 bytes (37.4k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.2.23.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 1.2.23 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 1277 bytes by using my AngularJS 1.2.23 Zopfli version instead of the best available CDN (3.34% smaller than Yandex, 38257 vs. 39534 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 --mls8192 --bsr18 --lazy --ohh

(found February 16, 2016)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	8192	--mls8192
block splitting recursion	18	--bsr18
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/1.2.23/angular.min.js --location | md5sum
b2fa50a94417bbcc2d60df8b8285d881 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.2.23.min.zopfli.js.gz | md5sum
b2fa50a94417bbcc2d60df8b8285d881 -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.2.23/angular.min.js --location | sha1sum
2755345c3cb379385b928e1382f0f38994f2f92d -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.2.23.min.zopfli.js.gz | sha1sum
2755345c3cb379385b928e1382f0f38994f2f92d -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	45243 bytes	b2fa50a94417bbcc2d60df8b8285d881	March 18, 2015 @ 10:32
cdnjs	39839 bytes	b2fa50a94417bbcc2d60df8b8285d881	December 18, 2014 @ 18:00
Google	39535 bytes	b2fa50a94417bbcc2d60df8b8285d881	August 23, 2014 @ 06:36
Yandex	39534 bytes	b2fa50a94417bbcc2d60df8b8285d881	June 11, 2015 @ 14:17

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
38257 bytes	-1 byte	zopfli --i100000 --mls8192 --bsr18 --lazy --ohh	February 16, 2016 @ 12:13
38258 bytes	-1 byte	zopfli --i100000 --mls16 --bsr19 --lazy --ohh	February 16, 2016 @ 11:34
38259 bytes	-2 bytes	zopfli --i100000 --mls128 --bsr6 --lazy --ohh	November 27, 2015 @ 23:06
38261 bytes	-1 byte	zopfli --i10000 --mls128 --bsr6 --lazy --ohh	October 14, 2015 @ 07:51
38262 bytes	-1 byte	zopfli --i10000 --mls1024 --bsr8 --lazy --ohh	September 9, 2015 @ 13:24
38263 bytes	-1 byte	zopfli --i1000 --mls512 --bsr10 --lazy --ohh	September 7, 2015 @ 19:41
38264 bytes	-3 bytes	zopfli --i1000 --mls512 --bsr8 --lazy --ohh	September 7, 2015 @ 19:41
38267 bytes	–	zopfli --i100 --mls8192 --bsr11 --lazy --ohh	September 7, 2015 @ 16:18

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 @ 12:48.

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	38263	38264	38264	38264	38267	38267	38267	38268	38268	38268	38269	38267	38267	38265	38265
4	38265	38265	38264	38263	38262	38263	38265	38266	38268	38265	38265	38266	38265	38263	38269
6	38267	38266	38267	38262	38262	38262	38259	38263	38264	38265	38272	38264	38263	38264	38268
7	38270	38270	38263	38262	38263	38263	38263	38263	38263	38268	38263	38264	38263	38263	38264
8	38269	38263	38262	38258	38263	38263	38263	38264	38263	38262	38263	38265	38262	38263	38268
9	38262	38263	38280	38273	38275	38274	38279	38268	38263	38281	38277	38272	38262	38263	38264
10	38267	38269	38263	38259	38280	38282	38275	38264	38263	38269	38263	38273	38263	38263	38264
11	38262	38262	38262	38259	38262	38268	38263	38263	38263	38268	38275	38279	38262	38263	38268
12	38263	38262	38263	38262	38263	38268	38262	38270	38267	38268	38262	38274	38263	38263	38268
13	38262	38262	38262	38262	38262	38263	38262	38262	38263	38267	38271	38273	38264	38264	38268
14	38262	38263	38262	38259	38263	38263	38262	38262	38264	38268	38265	38273	38263	38263	38264
15	38267	38267	38265	38262	38263	38263	38262	38264	38263	38268	38262	38273	38262	38264	38264
16	38271	38277	38279	38281	38278	38283	38272	38280	38281	38267	38265	38273	38263	38263	38269
17	38262	38263	38264	38259	38268	38267	38263	38263	38267	38281	38277	38278	38262	38263	38268
18	38267	38266	38263	38263	38263	38263	38262	38263	38263	38268	38264	38273	38257	38264	38268
19	38267	38266	38264	38258	38263	38263	38263	38264	38268	38269	38262	38273	38263	38263	38266
20	38263	38267	38262	38262	38263	38263	38262	38263	38265	38262	38262	38273	38262	38263	38269
21	38266	38267	38262	38262	38262	38269	38262	38263	38262	38268	38263	38273	38257	38263	38266
22	38263	38263	38262	38262	38263	38267	38263	38264	38263	38268	38264	38273	38263	38263	38270
23	38267	38268	38262	38263	38262	38263	38262	38263	38263	38268	38265	38273	38262	38263	38264
25	38262	38262	38263	38262	38262	38263	38262	38263	38263	38268	38263	38273	38263	38263	38269
30	38262	38262	38262	38259	38263	38263	38262	38264	38263	38269	38262	38273	38262	38264	38268
40	38263	38262	38262	38257	38263	38263	38263	38263	38262	38269	38260	38274	38262	38263	38268

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	38266 bytes	–	100%
1,000	38262 bytes	-4 bytes	100%
10,000	38261 bytes	-1 byte	100%
100,000	38257 bytes	-4 bytes	3.48%
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)	38333 bytes	+76 bytes (+0.20%)	–
1	38333 bytes	+76 bytes (+0.20%)	–
2	38353 bytes	+96 bytes (+0.25%)	+20 bytes
3	38383 bytes	+126 bytes (+0.33%)	+50 bytes
4	38420 bytes	+163 bytes (+0.43%)	+87 bytes
5	38445 bytes	+188 bytes (+0.49%)	+112 bytes
6	38411 bytes	+154 bytes (+0.40%)	+78 bytes
7	38394 bytes	+137 bytes (+0.36%)	+61 bytes
8	38410 bytes	+153 bytes (+0.40%)	+77 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	31042 bytes	-7215 bytes (-18.86%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	32206 bytes	-6051 bytes (-15.82%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	33733 bytes	-4524 bytes (-11.83%)
Brotli (Wikipedia)	brotli	brotli -q 11	35100 bytes	-3157 bytes (-8.25%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	36122 bytes	-2135 bytes (-5.58%)
LZMA2 (Wikipedia)	xz	xz -9	36528 bytes	-1729 bytes (-4.52%)
Zstandard (Wikipedia)	zstd	zstd -19	37472 bytes	-785 bytes (-2.05%)

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.