AngularJS 1.5.2 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1135200 bytes (1,108.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 155225 bytes (151.6k, 14%).

After GZIP compression these minified files vary in size:

Boot	63230 bytes (61.7k)	CDN
cdnjs	55324 bytes (54.0k)	CDN
unpkg	54947 bytes (53.7k)	CDN
gzip -6 (default)	54933 bytes (53.6k)	local copy
Google	54883 bytes (53.6k)	CDN
gzip -9	54834 bytes (53.5k)	local copy
7zip -mx=9 -tgzip	53150 bytes (51.9k)	local copy
libdeflate -12	53108 bytes (51.9k)	local copy
zultra	53103 bytes (51.9k)	local copy
kzip -s0 -rn -b8	53062 bytes (51.8k)	local copy
pigz -11 -n	53043 bytes (51.8k)	local copy
Zopfli	53004 bytes (51.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.5.2.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 1.5.2 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 1879 bytes by using my AngularJS 1.5.2 Zopfli version instead of the best available CDN (3.55% smaller than Google, 53004 vs. 54883 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 --i1000000 --mb8 --mls512 --bsr40 --lazy --ohh

(found March 21, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	512	--mls512
block splitting recursion	40	--bsr40
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/1.5.2/angular.min.js --location | md5sum
f20e684c7cf479a26d8df43857f6d500 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.5.2.min.zopfli.js.gz | md5sum
f20e684c7cf479a26d8df43857f6d500 -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.5.2/angular.min.js --location | sha1sum
530031bf966b42fabf13524b09f90029cc5710b7 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.5.2.min.zopfli.js.gz | sha1sum
530031bf966b42fabf13524b09f90029cc5710b7 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	63230 bytes	f20e684c7cf479a26d8df43857f6d500	May 3, 2016 @ 10:32
cdnjs	55324 bytes	f20e684c7cf479a26d8df43857f6d500	March 19, 2016 @ 13:46
unpkg	54947 bytes	f20e684c7cf479a26d8df43857f6d500	July 11, 2016 @ 15:52
Google	54883 bytes	f20e684c7cf479a26d8df43857f6d500	March 19, 2016 @ 19:29

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
53004 bytes	-5 bytes	zopfli --i1000000 --mls512 --bsr40 --lazy --ohh	March 21, 2016 @ 07:43
53009 bytes	-3 bytes	zopfli --i100000 --mls512 --bsr40 --lazy --ohh	March 21, 2016 @ 01:38
53012 bytes	-9 bytes	zopfli --i10000 --mls512 --bsr40 --lazy --ohh	March 21, 2016 @ 00:57
53021 bytes	-3 bytes	zopfli --i1000 --mls512 --bsr40 --lazy --ohh	March 21, 2016 @ 00:45
53024 bytes	-4 bytes	zopfli --i1000 --mls4096 --bsr30 --lazy --ohh	March 21, 2016 @ 00:43
53028 bytes	–	zopfli --i100 --mls4096 --bsr30 --lazy --ohh	March 20, 2016 @ 11:15

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 @ 12:43.

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, 100,000 or 1,000,000.

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	53049	53049	53049	53050	53050	53052	53052	53052	53039	53051	53051	53039	53042	53051	53049
4	53043	53043	53042	53034	53032	53026	53028	53027	53026	53033	53025	53027	53025	53023	53037
6	53034	53033	53035	53032	53032	53033	53029	53025	53024	53033	53033	53024	53027	53027	53030
7	53037	53033	53045	53039	53040	53029	53039	53023	53037	53033	53024	53041	53023	53037	53021
8	53036	53032	53037	53033	53033	53029	53029	53023	53022	53023	53033	53036	53040	53023	53024
9	53045	53035	53028	53035	53031	53030	53030	53026	53022	53023	53022	53021	53037	53023	53037
10	53037	53033	53042	53042	53034	53029	53028	53026	53031	53023	53023	53021	53022	53022	53037
11	53033	53030	53042	53041	53025	53028	53027	53026	53024	53033	53023	53023	53037	53024	53032
12	53024	53033	53042	53037	53033	53026	53029	53023	53025	53034	53023	53021	53028	53024	53037
13	53040	53041	53042	53034	53025	53026	53029	53026	53025	53023	53023	53023	53027	53023	53024
14	53051	53034	53040	53042	53025	53029	53030	53024	53022	53024	53023	53020	53027	53024	53024
15	53037	53033	53043	53042	53025	53026	53029	53027	53022	53023	53024	53023	53035	53023	53037
16	53038	53032	53038	53030	53025	53029	53026	53027	53034	53023	53023	53022	53027	53023	53023
17	53023	53030	53027	53037	53033	53025	53028	53026	53024	53023	53030	53033	53026	53021	53036
18	53035	53033	53042	53037	53034	53029	53029	53027	53024	53023	53023	53024	53037	53023	53037
19	53038	53034	53038	53033	53033	53029	53028	53026	53022	53022	53023	53021	53028	53025	53037
20	53023	53032	53037	53033	53024	53029	53029	53025	53024	53023	53023	53023	53027	53024	53036
21	53035	53033	53038	53037	53040	53029	53029	53022	53022	53023	53023	53021	53025	53023	53036
22	53023	53023	53039	53038	53025	53029	53029	53026	53024	53023	53023	53022	53026	53026	53038
23	53024	53011	53039	53037	53024	53028	53028	53025	53022	53022	53023	53023	53028	53024	53038
25	53024	53023	53028	53030	53025	53028	53029	53022	53022	53035	53023	53023	53026	53023	53037
30	53024	53024	53042	53024	53025	53029	53029	53027	53022	53035	53024	53021	53027	53024	53037
40	53029	53022	53030	53031	53022	53019	53016	53013	53004	53020	53023	53023	53037	53021	53023

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	53028 bytes	–	100%
1,000	53021 bytes	-7 bytes	100%
10,000	53012 bytes	-9 bytes	100%
100,000	53009 bytes	-3 bytes	1.16%
1,000,000	53004 bytes	-5 bytes	0.29%
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)	53137 bytes	+133 bytes (+0.25%)	+75 bytes
1	53131 bytes	+127 bytes (+0.24%)	+69 bytes
2	53152 bytes	+148 bytes (+0.28%)	+90 bytes
3	53150 bytes	+146 bytes (+0.28%)	+88 bytes
4	53151 bytes	+147 bytes (+0.28%)	+89 bytes
5	53189 bytes	+185 bytes (+0.35%)	+127 bytes
6	53184 bytes	+180 bytes (+0.34%)	+122 bytes
7	53107 bytes	+103 bytes (+0.19%)	+45 bytes
8	53062 bytes	+58 bytes (+0.11%)	–

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	41109 bytes	-11895 bytes (-22.44%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	43440 bytes	-9564 bytes (-18.04%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	44826 bytes	-8178 bytes (-15.43%)
Brotli (Wikipedia)	brotli	brotli -q 11	48258 bytes	-4746 bytes (-8.95%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	48974 bytes	-4030 bytes (-7.60%)
LZMA2 (Wikipedia)	xz	xz -9	49692 bytes	-3312 bytes (-6.25%)
Zstandard (Wikipedia)	zstd	zstd -19	51141 bytes	-1863 bytes (-3.51%)

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 2025.
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.