AngularJS 1.5.3 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1141759 bytes (1,115.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 155877 bytes (152.2k, 14%).

After GZIP compression these minified files vary in size:

Boot	63479 bytes (62.0k)	CDN
cdnjs	55561 bytes (54.3k)	CDN
unpkg	55189 bytes (53.9k)	CDN
gzip -6 (default)	55180 bytes (53.9k)	local copy
Google	55124 bytes (53.8k)	CDN
gzip -9	55084 bytes (53.8k)	local copy
libdeflate -12	53357 bytes (52.1k)	local copy
7zip -mx=9 -tgzip	53354 bytes (52.1k)	local copy
kzip -s0 -rn -b0	53345 bytes (52.1k)	local copy
zultra	53322 bytes (52.1k)	local copy
pigz -11 -n	53320 bytes (52.1k)	local copy
Zopfli	53226 bytes (52.0k)	local copy
Zopfli (defluff)	53225 bytes (52.0k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.5.3.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 1.5.3 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 1898 bytes by using my AngularJS 1.5.3 Zopfli version instead of the best available CDN (3.57% smaller than Google, 53226 vs. 55124 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 --mls1024 --bsr30 --lazy --ohh

(found March 29, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	1024	--mls1024
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

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 (53225 bytes).

Download

Verify file integrity

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

MD5:
curl --silent --compressed https://code.angularjs.org/1.5.3/angular.min.js --location | md5sum
0744b6e5cd7b7cdad98cefb3d9c141c6 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.5.3.min.zopfli.js.gz | md5sum
0744b6e5cd7b7cdad98cefb3d9c141c6 -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.5.3/angular.min.js --location | sha1sum
62c2a0c7e119887c9a69308b6016eb07abcca075 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-1.5.3.min.zopfli.js.gz | sha1sum
62c2a0c7e119887c9a69308b6016eb07abcca075 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	63479 bytes	0744b6e5cd7b7cdad98cefb3d9c141c6	May 3, 2016 @ 10:35
cdnjs	55561 bytes	0744b6e5cd7b7cdad98cefb3d9c141c6	March 26, 2016 @ 03:46
unpkg	55189 bytes	0744b6e5cd7b7cdad98cefb3d9c141c6	July 11, 2016 @ 15:51
Google	55124 bytes	0744b6e5cd7b7cdad98cefb3d9c141c6	March 25, 2016 @ 22:02

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
53226 bytes	-4 bytes	zopfli --i1000000 --mls1024 --bsr30 --lazy --ohh	March 29, 2016 @ 17:35
53230 bytes	-4 bytes	zopfli --i100000 --mls1024 --bsr30 --lazy --ohh	March 28, 2016 @ 09:23
53234 bytes	-7 bytes	zopfli --i10000 --mls1024 --bsr30 --lazy --ohh	March 28, 2016 @ 07:33
53241 bytes	-1 byte	zopfli --i1000 --mls1024 --bsr30 --lazy --ohh	March 28, 2016 @ 07:26
53242 bytes	-3 bytes	zopfli --i10000 --mls1024 --bsr14 --lazy --ohh	March 28, 2016 @ 07:15
53245 bytes	-1 byte	zopfli --i1000 --mls1024 --bsr14 --lazy --ohh	March 28, 2016 @ 07:07
53246 bytes	-4 bytes	zopfli --i1000 --mls1024 --bsr19 --lazy --ohh	March 28, 2016 @ 07:06
53250 bytes	-3 bytes	zopfli --i1000 --mls4096 --bsr20 --lazy --ohh	March 28, 2016 @ 07:04
53253 bytes	-2 bytes	zopfli --i1000 --mls64 --bsr12 --lazy --ohh	March 28, 2016 @ 07:04
53255 bytes	–	zopfli --i100 --mls64 --bsr12 --lazy --ohh	March 28, 2016 @ 07:02

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 @ 12:49.

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	53277	53274	53274	53275	53276	53274	53274	53276	53275	53277	53276	53265	53270	53271	53272
4	53275	53268	53260	53259	53261	53259	53254	53254	53258	53259	53258	53252	53261	53250	53253
6	53252	53253	53253	53255	53253	53247	53251	53252	53260	53251	53254	53259	53259	53261	53248
7	53271	53272	53271	53269	53266	53255	53268	53252	53258	53260	53247	53249	53260	53265	53252
8	53251	53254	53253	53254	53255	53253	53257	53255	53258	53250	53254	53263	53268	53251	53252
9	53259	53261	53262	53259	53249	53253	53258	53253	53258	53241	53247	53249	53251	53255	53250
10	53254	53268	53258	53262	53262	53246	53258	53253	53260	53242	53245	53249	53259	53252	53250
11	53267	53265	53262	53261	53263	53254	53254	53253	53258	53251	53252	53249	53259	53252	53253
12	53256	53255	53265	53266	53259	53246	53250	53257	53258	53250	53254	53249	53259	53251	53252
13	53257	53256	53260	53267	53261	53247	53258	53257	53257	53251	53253	53249	53249	53251	53250
14	53266	53252	53262	53258	53253	53247	53258	53249	53258	53235	53247	53250	53252	53251	53250
15	53271	53269	53262	53261	53264	53253	53258	53249	53258	53251	53247	53248	53251	53253	53253
16	53255	53251	53259	53259	53258	53257	53258	53260	53260	53241	53252	53249	53254	53251	53250
17	53252	53259	53252	53254	53263	53247	53257	53253	53258	53251	53254	53249	53255	53249	53251
18	53256	53251	53257	53257	53257	53246	53257	53253	53259	53242	53252	53249	53251	53251	53249
19	53268	53270	53253	53267	53259	53246	53258	53254	53252	53242	53248	53248	53254	53252	53250
20	53252	53254	53252	53263	53255	53242	53258	53250	53258	53242	53255	53249	53252	53250	53252
21	53256	53252	53260	53263	53253	53246	53258	53253	53260	53251	53247	53249	53251	53251	53252
22	53258	53269	53259	53257	53264	53253	53258	53253	53258	53251	53247	53249	53253	53258	53250
23	53249	53256	53252	53259	53266	53252	53250	53251	53260	53251	53252	53249	53253	53252	53253
25	53246	53248	53259	53254	53253	53246	53255	53254	53258	53251	53249	53249	53259	53253	53250
30	53252	53247	53250	53262	53249	53244	53249	53253	53258	53226	53248	53249	53250	53253	53253
40	53252	53246	53256	53252	53253	53248	53249	53241	53248	53251	53255	53249	53252	53250	53252

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	53255 bytes	–	100%
1,000	53241 bytes	-14 bytes	100%
10,000	53234 bytes	-7 bytes	100%
100,000	53230 bytes	-4 bytes	0.58%
1,000,000	53226 bytes	-4 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)	53345 bytes	+119 bytes (+0.22%)	–
1	53347 bytes	+121 bytes (+0.23%)	+2 bytes
2	53363 bytes	+137 bytes (+0.26%)	+18 bytes
3	53365 bytes	+139 bytes (+0.26%)	+20 bytes
4	53373 bytes	+147 bytes (+0.28%)	+28 bytes
5	53390 bytes	+164 bytes (+0.31%)	+45 bytes
6	53393 bytes	+167 bytes (+0.31%)	+48 bytes
7	53383 bytes	+157 bytes (+0.29%)	+38 bytes
8	53408 bytes	+182 bytes (+0.34%)	+63 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	41352 bytes	-11874 bytes (-22.31%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	43646 bytes	-9580 bytes (-18.00%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	45054 bytes	-8172 bytes (-15.35%)
Brotli (Wikipedia)	brotli	brotli -q 11	48378 bytes	-4848 bytes (-9.11%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	49177 bytes	-4049 bytes (-7.61%)
LZMA2 (Wikipedia)	xz	xz -9	49908 bytes	-3318 bytes (-6.23%)
Zstandard (Wikipedia)	zstd	zstd -19	51377 bytes	-1849 bytes (-3.47%)

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.