AngularJS 1.5.6 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1155229 bytes (1,128.2k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 158915 bytes (155.2k, 14%).

After GZIP compression these minified files vary in size:

Boot	64421 bytes (62.9k)	CDN
cdnjs	56350 bytes (55.0k)	CDN
unpkg	55967 bytes (54.7k)	CDN
gzip -6 (default)	55960 bytes (54.6k)	local copy
Google	55907 bytes (54.6k)	CDN
gzip -9	55877 bytes (54.6k)	local copy
7zip -mx=9 -tgzip	54116 bytes (52.8k)	local copy
libdeflate -12	54104 bytes (52.8k)	local copy
zultra	54081 bytes (52.8k)	local copy
pigz -11 -n	54039 bytes (52.8k)	local copy
kzip -s0 -rn -b8	54037 bytes (52.8k)	local copy
Zopfli	53959 bytes (52.7k)	local copy
Zopfli (defluff)	53958 bytes (52.7k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.5.6.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 1.5.6 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 1948 bytes by using my AngularJS 1.5.6 Zopfli version instead of the best available CDN (3.61% smaller than Google, 53959 vs. 55907 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 --mls4 --bsr11 --lazy --ohh

(found June 2, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4	--mls4
block splitting recursion	11	--bsr11
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

Even Smaller Files Thanks To Defluff

Zopfli's output can be further optimized by the defluff tool.
In this particular case, defluff saves 1 more byte (53958 bytes).

Download

Verify file integrity

After decompression, my uncompressed files are identical to the original ones:

MD5:
curl --silent --compressed https://code.angularjs.org/1.5.6/angular.min.js --location | md5sum
1fbd6b010938cee7268f503865b56559 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.5.6.min.zopfli.js.gz | md5sum
1fbd6b010938cee7268f503865b56559 -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.5.6/angular.min.js --location | sha1sum
394471692d5ce0b5c31e13e675144c990e0c4eed -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.5.6.min.zopfli.js.gz | sha1sum
394471692d5ce0b5c31e13e675144c990e0c4eed -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	64421 bytes	1fbd6b010938cee7268f503865b56559	May 29, 2016 @ 19:30
cdnjs	56350 bytes	1fbd6b010938cee7268f503865b56559	May 29, 2016 @ 10:31
unpkg	55967 bytes	1fbd6b010938cee7268f503865b56559	July 11, 2016 @ 15:51
Google	55907 bytes	1fbd6b010938cee7268f503865b56559	June 2, 2016 @ 00:19

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
53959 bytes	-5 bytes	zopfli --i1000000 --mls4 --bsr11 --lazy --ohh	June 2, 2016 @ 06:51
53964 bytes	-4 bytes	zopfli --i100000 --mls4 --bsr11 --lazy --ohh	May 28, 2016 @ 14:54
53968 bytes	-4 bytes	zopfli --i10000 --mls4 --bsr11 --lazy --ohh	May 28, 2016 @ 13:53
53972 bytes	-1 byte	zopfli --i1000 --mls4 --bsr11 --lazy --ohh	May 28, 2016 @ 13:47
53973 bytes	-15 bytes	zopfli --i1000 --mls4 --bsr23 --lazy --ohh	May 28, 2016 @ 13:47
53988 bytes	–	zopfli --i100 --mls4 --bsr11 --lazy --ohh	May 28, 2016 @ 13:43

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 @ 12:55.

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	54032	54031	54030	54035	54031	54032	54033	54032	54034	54035	54032	54023	54026	54032	54032
4	54022	54024	54020	54024	54020	54021	54013	54019	54020	54013	54022	54021	54019	54018	54018
6	54020	54019	54019	54019	54021	54014	54011	54019	54021	54019	54020	54022	54019	53974	54020
7	54017	54020	53997	54030	54025	54022	54010	54017	54011	54026	54023	54008	54010	53974	54009
8	54020	53980	53980	54018	54020	54019	54011	54018	54011	54011	54010	54012	54023	54012	54021
9	54015	54020	54023	54017	54020	54014	54010	54018	54011	54011	54023	54018	54009	53973	54008
10	54036	54001	53999	54018	54020	54022	54010	54018	54010	54020	54011	54021	54010	53975	54010
11	54027	53959	53984	53983	54025	54019	54010	54018	54010	54019	54011	54008	54010	53976	54020
12	54012	53979	54022	54026	54020	54015	54010	54018	54015	54010	54010	54020	54009	53975	54020
13	54011	54012	54021	54019	54020	54021	54011	54018	54010	54019	54011	54008	54010	53977	54010
14	53974	53970	53979	53995	54020	54020	54011	54019	54018	54020	54011	54011	54011	53974	54019
15	54012	54016	54027	54018	54021	54022	54010	54018	54021	54022	54011	54021	54011	54010	54010
16	54022	53982	53991	53985	54020	54019	54013	54018	54011	54021	54023	54012	54010	54010	54010
17	54016	53980	53987	54018	54020	54019	54010	54018	54019	54022	54020	54008	54010	53978	54013
18	54019	54012	54018	54019	54020	54020	54010	54018	54012	54019	54013	54009	54010	53975	54020
19	54019	54018	54020	54020	54020	54019	54010	54018	54011	54020	54023	54008	54009	53975	54009
20	54012	53970	53985	54018	54020	54021	54010	54018	53981	54012	54020	54008	54011	53974	54013
21	54014	54012	53993	54018	54020	54019	54010	54017	54019	54011	54011	54008	54010	54012	54010
22	54019	54012	54021	54020	54020	54020	54010	54018	54019	54023	54011	54009	54009	54010	54009
23	54001	53966	54029	54022	54020	54019	54009	54018	54020	54023	54009	54021	54009	53977	54017
25	54015	54011	54019	54018	54021	54019	54010	54019	54021	54021	54011	54020	54012	53974	54020
30	54007	54007	54006	54006	54020	54021	54010	54018	53981	54019	54011	54008	54012	53976	54008
40	54004	54002	54007	54006	54007	54009	53996	54008	54010	54019	54023	54021	54009	53982	54008

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	53988 bytes	–	100%
1,000	53972 bytes	-16 bytes	100%
10,000	53968 bytes	-4 bytes	100%
100,000	53964 bytes	-4 bytes	0.58%
1,000,000	53959 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)	54112 bytes	+153 bytes (+0.28%)	+75 bytes
1	54118 bytes	+159 bytes (+0.29%)	+81 bytes
2	54126 bytes	+167 bytes (+0.31%)	+89 bytes
3	54116 bytes	+157 bytes (+0.29%)	+79 bytes
4	54119 bytes	+160 bytes (+0.30%)	+82 bytes
5	54148 bytes	+189 bytes (+0.35%)	+111 bytes
6	54140 bytes	+181 bytes (+0.34%)	+103 bytes
7	54087 bytes	+128 bytes (+0.24%)	+50 bytes
8	54037 bytes	+78 bytes (+0.14%)	–

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	41784 bytes	-12175 bytes (-22.56%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	44163 bytes	-9796 bytes (-18.15%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	45652 bytes	-8307 bytes (-15.40%)
Brotli (Wikipedia)	brotli	brotli -q 11	49087 bytes	-4872 bytes (-9.03%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	49796 bytes	-4163 bytes (-7.72%)
LZMA2 (Wikipedia)	xz	xz -9	50572 bytes	-3387 bytes (-6.28%)
Zstandard (Wikipedia)	zstd	zstd -19	52036 bytes	-1923 bytes (-3.56%)

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.