Choose a version:
13% The original file has 1187559 bytes (1,159.7k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 160048 bytes (156.3k, 13%).

After GZIP compression these minified files vary in size:
Boot
  64855 bytes (63.3k)
CDN, direct link
cdnjs
  56714 bytes (55.4k)
CDN, direct link
cdnhttps
  56300 bytes (55.0k)
CDN, direct link
unpkg
  56300 bytes (55.0k)
CDN, direct link
gzip -6 (default)
  56295 bytes (55.0k)
local copy
Google
  56252 bytes (54.9k)
CDN, direct link
gzip -9
  56206 bytes (54.9k)
local copy
jsdelivr
  56201 bytes (54.9k)
CDN, direct link
7zip -mx=9 -tgzip
  54472 bytes (53.2k)
local copy
kzip -s0 -rn -b1
  54456 bytes (53.2k)
local copy
libdeflate -12
  54452 bytes (53.2k)
local copy
pigz -11 -n
  54399 bytes (53.1k)
local copy
Zopfli
  54316 bytes (53.0k)
local copy
Zopfli (defluff)
  54315 bytes (53.0k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.5.8.min.js

You will automatically get the smallest AngularJS 1.5.8 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 1885 bytes by using my AngularJS 1.5.8 Zopfli version instead of the best available CDN (3.47% smaller than jsdelivr, 54316 vs. 56201 bytes):
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 --mls16384 --bsr14 --lazy --ohh

(found November 26, 2016)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 16384  --mls16384
block splitting recursion 14  --bsr14
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 (54315 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://code.angularjs.org/1.5.8/angular.min.js --location | md5sum
c8ddded85c81cfcd8dd4e54b71724d85  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.5.8.min.zopfli.js.gz | md5sum
c8ddded85c81cfcd8dd4e54b71724d85  -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.5.8/angular.min.js --location | sha1sum
78069f9f3a9ca9652cb04c13ccb0670d747666b8  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.5.8.min.zopfli.js.gz | sha1sum
78069f9f3a9ca9652cb04c13ccb0670d747666b8  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 64855 bytes c8ddded85c81cfcd8dd4e54b71724d85 July 25, 2016 @ 10:50
cdnjs 56714 bytes c8ddded85c81cfcd8dd4e54b71724d85 July 22, 2016 @ 20:31
cdnhttps 56300 bytes c8ddded85c81cfcd8dd4e54b71724d85 November 22, 2016 @ 16:29
unpkg 56300 bytes c8ddded85c81cfcd8dd4e54b71724d85 July 25, 2016 @ 10:32
Google 56252 bytes c8ddded85c81cfcd8dd4e54b71724d85 July 22, 2016 @ 20:27
jsdelivr 56201 bytes c8ddded85c81cfcd8dd4e54b71724d85 November 29, 2016 @ 20:28

Note: only the MD5 hashes are shown to keep things simple.

Other Versions

Available AngularJS versions at minime.stephan-brumme.com:

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
54316 bytes -2 bytes zopfli --i1000000 --mls16384 --bsr14 --lazy --ohh November 26, 2016 @ 03:02
54318 bytes -2 bytes zopfli --i1000000 --mls16384 --bsr7 --lazy --ohh July 26, 2016 @ 04:59
54320 bytes -1 byte zopfli --i100000 --mls16384 --bsr7 --lazy --ohh July 25, 2016 @ 13:35
54321 bytes -3 bytes zopfli --i100000 --mls16384 --bsr18 --lazy --ohh July 25, 2016 @ 12:19
54324 bytes -1 byte zopfli --i10000 --mls16384 --bsr18 --lazy --ohh July 25, 2016 @ 11:14
54325 bytes -2 bytes zopfli --i10000 --mls16384 --bsr14 --lazy --ohh July 25, 2016 @ 11:08
54327 bytes -14 bytes zopfli --i1000 --mls16384 --bsr14 --lazy --ohh July 25, 2016 @ 11:01
54341 bytes zopfli --i100 --mls16384 --bsr18 --lazy --ohh July 25, 2016 @ 10:50

If there are multiple parameter sets yielding the same compressed size, only the first one found is shown.

Most recent activity on November 29, 2016 @ 20:28.

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
54382 54377 54383 54381 54383 54382 54383 54383 54387 54383 54386 54369 54371 54361 54382
54376 54352 54377 54379 54371 54366 54370 54370 54362 54365 54362 54368 54362 54335 54371
54375 54377 54372 54376 54374 54367 54367 54364 54369 54369 54367 54363 54368 54322 54374
54368 54339 54339 54340 54339 54369 54371 54365 54358 54367 54369 54357 54365 54318 54378
54337 54354 54338 54339 54373 54368 54372 54364 54366 54367 54363 54359 54369 54322 54372
54374 54371 54369 54370 54373 54370 54371 54365 54369 54370 54369 54358 54357 54329 54369
54374 54371 54371 54370 54370 54369 54370 54370 54367 54372 54368 54362 54367 54328 54372
54336 54344 54336 54362 54369 54369 54370 54365 54369 54362 54370 54357 54367 54321 54371
54373 54377 54378 54374 54371 54366 54371 54371 54358 54373 54372 54357 54367 54333 54369
54372 54367 54345 54370 54372 54368 54368 54365 54369 54368 54369 54357 54367 54330 54369
54375 54339 54337 54372 54372 54371 54370 54371 54369 54372 54369 54360 54367 54316 54370
54376 54372 54378 54373 54375 54369 54365 54365 54370 54372 54369 54357 54367 54333 54372
54373 54368 54336 54338 54370 54366 54365 54364 54367 54371 54369 54358 54364 54331 54372
54338 54342 54335 54379 54372 54369 54371 54363 54367 54368 54362 54360 54358 54326 54374
54375 54353 54371 54369 54373 54367 54371 54367 54367 54370 54369 54363 54357 54321 54369
54373 54371 54371 54372 54374 54369 54371 54371 54369 54370 54369 54367 54358 54322 54369
54348 54347 54343 54336 54373 54371 54370 54371 54367 54370 54369 54358 54359 54322 54373
54376 54336 54370 54370 54369 54369 54367 54371 54369 54372 54372 54357 54357 54322 54372
54377 54348 54371 54335 54339 54368 54372 54371 54358 54370 54372 54358 54367 54321 54369
54376 54340 54335 54352 54371 54368 54372 54363 54369 54370 54373 54366 54361 54335 54371
54373 54337 54335 54373 54339 54369 54373 54367 54369 54371 54375 54366 54368 54331 54370
54374 54362 54342 54372 54369 54370 54367 54364 54370 54374 54361 54358 54367 54319 54372
54372 54341 54344 54369 54371 54360 54364 54364 54360 54369 54368 54357 54358 54336 54373

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 54341 bytes 100%
1,000 54326 bytes -15 bytes 100%
10,000 54324 bytes -2 bytes 100%
100,000 54320 bytes -4 bytes 3.19%
1,000,000 54316 bytes -4 bytes 0.87%
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
54461 bytes +145 bytes (+0.27%) +5 bytes
54456 bytes +140 bytes (+0.26%)
54472 bytes +156 bytes (+0.29%) +16 bytes
54477 bytes +161 bytes (+0.30%) +21 bytes
54475 bytes +159 bytes (+0.29%) +19 bytes
54506 bytes +190 bytes (+0.35%) +50 bytes
54505 bytes +189 bytes (+0.35%) +49 bytes
54520 bytes +204 bytes (+0.38%) +64 bytes
54556 bytes +240 bytes (+0.44%) +100 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
Algorithm Program Parameters Size Compared To Best Zopfli
ZPAQ (Wikipedia) zpaq zpaq -method 69 42075 bytes -12241 bytes (-22.54%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 44493 bytes -9823 bytes (-18.08%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 45990 bytes -8326 bytes (-15.33%)
Brotli (Wikipedia) brotli brotli -q 11 49431 bytes -4885 bytes (-8.99%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 50153 bytes -4163 bytes (-7.66%)
LZMA2 (Wikipedia) xz xz -9 50888 bytes -3428 bytes (-6.31%)
ZSTD (Wikipedia) zstd zstd -19 52386 bytes -1930 bytes (-3.55%)

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):


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 2017.
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