AngularJS 1.2.19 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 769976 bytes (751.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 106439 bytes (103.9k, 14%).

After GZIP compression these minified files vary in size:

Boot	44899 bytes (43.8k)	CDN
cdnjs	39572 bytes (38.6k)	CDN
gzip -6 (default)	39327 bytes (38.4k)	local copy
gzip -9	39279 bytes (38.4k)	local copy
Yandex	39264 bytes (38.3k)	CDN
jsdelivr	39264 bytes (38.3k)	CDN
Google	39255 bytes (38.3k)	CDN
Sina	39255 bytes (38.3k)	CDN
7zip -mx=9 -tgzip	38087 bytes (37.2k)	local copy
kzip -s0 -rn -b1	38072 bytes (37.2k)	local copy
zultra	38064 bytes (37.2k)	local copy
libdeflate -12	38055 bytes (37.2k)	local copy
pigz -11 -n	38034 bytes (37.1k)	local copy
Zopfli	38001 bytes (37.1k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.2.19.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 1.2.19 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 1254 bytes by using my AngularJS 1.2.19 Zopfli version instead of the best available CDN (3.30% smaller than Sina, 38001 vs. 39255 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 --mls16384 --bsr12 --lazy --ohh

(found November 27, 2015)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	16384	--mls16384
block splitting recursion	12	--bsr12
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/1.2.19/angular.min.js --location | md5sum
027d33a76ad746cfedb6cff76188cb4b -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.2.19.min.zopfli.js.gz | md5sum
027d33a76ad746cfedb6cff76188cb4b -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.2.19/angular.min.js --location | sha1sum
8ce5788a703f30891d63eb8d18ae0ee7797f1f1a -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.2.19.min.zopfli.js.gz | sha1sum
8ce5788a703f30891d63eb8d18ae0ee7797f1f1a -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	44899 bytes	027d33a76ad746cfedb6cff76188cb4b	March 18, 2015 @ 10:28
cdnjs	39572 bytes	027d33a76ad746cfedb6cff76188cb4b	July 19, 2014 @ 05:15
Yandex	39264 bytes	027d33a76ad746cfedb6cff76188cb4b	June 11, 2015 @ 14:17
jsdelivr	39264 bytes	027d33a76ad746cfedb6cff76188cb4b	August 7, 2014 @ 18:32
Google	39255 bytes	027d33a76ad746cfedb6cff76188cb4b	July 1, 2014 @ 20:26
Sina	39255 bytes	027d33a76ad746cfedb6cff76188cb4b	July 2, 2014 @ 12:00

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
38001 bytes	-1 byte	zopfli --i100000 --mls16384 --bsr12 --lazy --ohh	November 27, 2015 @ 23:34
38002 bytes	-3 bytes	zopfli --i100000 --mls16384 --bsr20 --lazy --ohh	November 27, 2015 @ 22:58
38005 bytes	-1 byte	zopfli --i10000 --mls8192 --bsr6 --lazy --ohh	September 9, 2015 @ 16:24
38006 bytes	-2 bytes	zopfli --i10000 --mls512 --bsr14 --lazy --ohh	September 9, 2015 @ 16:00
38008 bytes	-1 byte	zopfli --i1000 --mls8192 --bsr10 --lazy --ohh	September 7, 2015 @ 20:02
38009 bytes	-1 byte	zopfli --i1000 --mls512 --bsr9 --lazy --ohh	September 7, 2015 @ 20:00
38010 bytes	–	zopfli --i100 --mls8192 --bsr4 --lazy --ohh	September 7, 2015 @ 16:12

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	38008	38009	38008	38008	38009	38008	38011	38010	38009	38010	38008	38010	38010	38008	38008
4	38015	38017	38010	38010	38011	38024	38010	38023	38010	38009	38015	38013	38008	38006	38012
6	38008	38009	38012	38015	38011	38011	38011	38008	38014	38015	38016	38014	38005	38007	38009
7	38008	38008	38006	38009	38009	38010	38007	38010	38021	38025	38011	38021	38006	38002	38007
8	38011	38009	38007	38011	38007	38007	38010	38022	38011	38013	38012	38006	38007	38006	38010
9	38010	38011	38008	38030	38014	38010	38020	38024	38006	38013	38012	38021	38006	38007	38008
10	38012	38013	38007	38022	38015	38008	38010	38026	38021	38011	38011	38008	38006	38007	38008
11	38010	38010	38008	38010	38009	38011	38011	38009	38011	38012	38024	38023	38006	38007	38008
12	38009	38009	38007	38008	38010	38010	38010	38015	38010	38012	38020	38010	38009	38001	38009
13	38009	38009	38007	38009	38008	38007	38010	38008	38007	38010	38015	38014	38007	38007	38008
14	38031	38008	38034	38008	38008	38011	38010	38007	38006	38010	38012	38011	38009	38007	38009
15	38014	38010	38013	38009	38013	38006	38013	38027	38010	38013	38012	38010	38007	38002	38010
16	38008	38011	38030	38029	38039	38022	38021	38026	38022	38023	38020	38011	38006	38003	38009
17	38009	38009	38008	38009	38009	38023	38008	38022	38026	38024	38023	38022	38009	38003	38009
18	38009	38009	38011	38009	38010	38010	38011	38012	38010	38013	38012	38010	38007	38006	38008
19	38011	38011	38007	38010	38009	38006	38009	38009	38010	38010	38012	38010	38006	38007	38006
20	38008	38008	38008	38008	38009	38008	38009	38009	38011	38008	38012	38010	38006	38002	38010
21	38011	38011	38009	38008	38008	38007	38020	38020	38014	38014	38011	38011	38006	38006	38008
22	38008	38008	38008	38009	38009	38006	38021	38020	38022	38022	38012	38023	38006	38006	38009
23	38010	38009	38007	38009	38011	38007	38010	38009	38011	38010	38012	38010	38007	38006	38008
25	38011	38008	38006	38009	38007	38008	38010	38007	38010	38006	38020	38007	38006	38006	38009
30	38006	38009	38006	38010	38008	38006	38020	38020	38010	38011	38011	38010	38006	38007	38009
40	38011	38013	38011	38008	38009	38011	38010	38010	38010	38012	38012	38010	38009	38007	38008

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	38007 bytes	–	100%
1,000	38006 bytes	-1 byte	100%
10,000	38005 bytes	-1 byte	100%
100,000	38001 bytes	-4 bytes	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)	38073 bytes	+72 bytes (+0.19%)	+1 byte
1	38072 bytes	+71 bytes (+0.19%)	–
2	38103 bytes	+102 bytes (+0.27%)	+31 bytes
3	38129 bytes	+128 bytes (+0.34%)	+57 bytes
4	38177 bytes	+176 bytes (+0.46%)	+105 bytes
5	38197 bytes	+196 bytes (+0.52%)	+125 bytes
6	38193 bytes	+192 bytes (+0.51%)	+121 bytes
7	38207 bytes	+206 bytes (+0.54%)	+135 bytes
8	38239 bytes	+238 bytes (+0.63%)	+167 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	30794 bytes	-7207 bytes (-18.97%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	32017 bytes	-5984 bytes (-15.75%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	33529 bytes	-4472 bytes (-11.77%)
Brotli (Wikipedia)	brotli	brotli -q 11	34865 bytes	-3136 bytes (-8.25%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	35853 bytes	-2148 bytes (-5.65%)
LZMA2 (Wikipedia)	xz	xz -9	36276 bytes	-1725 bytes (-4.54%)
Zstandard (Wikipedia)	zstd	zstd -19	37227 bytes	-774 bytes (-2.04%)

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.