Choose a version:
13% The original file has 960560 bytes (938.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 125909 bytes (123.0k, 13%).

After GZIP compression these minified files vary in size:
Boot
  53074 bytes (51.8k)
CDN, direct link
cdnjs
  46588 bytes (45.5k)
CDN, direct link
unpkg
  46306 bytes (45.2k)
CDN, direct link
gzip -6 (default)
  46275 bytes (45.2k)
local copy
cdnhttps
  46253 bytes (45.2k)
CDN, direct link
Google
  46225 bytes (45.1k)
CDN, direct link
Yandex
  46184 bytes (45.1k)
CDN, direct link
jsdelivr
  46184 bytes (45.1k)
CDN, direct link
gzip -9
  46182 bytes (45.1k)
local copy
7zip -mx=9 -tgzip
  44819 bytes (43.8k)
local copy
kzip -s0 -rn -b0
  44782 bytes (43.7k)
local copy
libdeflate -12
  44752 bytes (43.7k)
local copy
pigz -11 -n
  44712 bytes (43.7k)
local copy
Zopfli
  44685 bytes (43.6k)
local copy
Zopfli (defluff)
  44684 bytes (43.6k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.3.15.min.js

You will automatically get the smallest AngularJS 1.3.15 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 1499 bytes by using my AngularJS 1.3.15 Zopfli version instead of the best available CDN (3.35% smaller than jsdelivr, 44685 vs. 46184 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 --i100000 --mb8 --mls8192 --bsr12 --lazy --ohh

(found November 30, 2015)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 8192  --mls8192
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

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 (44684 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://code.angularjs.org/1.3.15/angular.min.js --location | md5sum
ca1a58818682c3e858a585f283ab9beb  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.3.15.min.zopfli.js.gz | md5sum
ca1a58818682c3e858a585f283ab9beb  -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.3.15/angular.min.js --location | sha1sum
c8470371db8d3735604343a9a059002d3a827663  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.3.15.min.zopfli.js.gz | sha1sum
c8470371db8d3735604343a9a059002d3a827663  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 53074 bytes ca1a58818682c3e858a585f283ab9beb March 23, 2015 @ 19:45
cdnjs 46588 bytes ca1a58818682c3e858a585f283ab9beb March 19, 2015 @ 06:30
unpkg 46306 bytes ca1a58818682c3e858a585f283ab9beb July 11, 2016 @ 15:53
cdnhttps 46253 bytes ca1a58818682c3e858a585f283ab9beb December 24, 2015 @ 07:32
Google 46225 bytes ca1a58818682c3e858a585f283ab9beb March 17, 2015 @ 23:05
Yandex 46184 bytes ca1a58818682c3e858a585f283ab9beb June 11, 2015 @ 14:17
jsdelivr 46184 bytes ca1a58818682c3e858a585f283ab9beb May 4, 2015 @ 19:44

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

Other Versions

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

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
44685 bytes -3 bytes zopfli --i100000 --mls8192 --bsr12 --lazy --ohh November 30, 2015 @ 14:19
44688 bytes -2 bytes zopfli --i10000 --mls8192 --bsr12 --lazy --ohh September 8, 2015 @ 23:27
44690 bytes -3 bytes zopfli --i10000 --mls8192 --bsr11 --lazy --ohh September 8, 2015 @ 22:57
44693 bytes -1 byte zopfli --i10000 --mls1024 --bsr11 --lazy --ohh September 8, 2015 @ 22:15
44694 bytes -2 bytes zopfli --i1000 --mls8192 --bsr12 --lazy --ohh September 7, 2015 @ 18:29
44696 bytes -1 byte zopfli --i1000 --mls512 --bsr11 --lazy --ohh September 7, 2015 @ 18:27
44697 bytes -1 byte zopfli --i1000 --mls512 --bsr16 --lazy --ohh September 7, 2015 @ 18:26
44698 bytes -1 byte zopfli --i1000 --mls1024 --bsr8 --lazy --ohh September 7, 2015 @ 18:25
44699 bytes zopfli --i100 --mls1024 --bsr9 --lazy --ohh September 7, 2015 @ 16:31

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

Most recent activity on July 11, 2016 @ 15:53.

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
44719 44720 44718 44717 44718 44720 44719 44722 44714 44720 44721 44712 44726 44710 44715
44715 44716 44716 44713 44718 44714 44709 44706 44712 44714 44706 44711 44710 44692 44713
44715 44713 44715 44713 44715 44714 44693 44698 44696 44695 44705 44699 44703 44691 44712
44717 44707 44704 44700 44696 44699 44689 44690 44704 44694 44714 44698 44688 44700 44706
44721 44714 44699 44703 44695 44718 44694 44697 44696 44695 44700 44697 44695 44692 44702
44720 44711 44713 44702 44714 44713 44694 44690 44696 44694 44700 44696 44702 44691 44727
44717 44706 44707 44711 44714 44703 44695 44689 44697 44694 44699 44697 44691 44692 44709
44720 44711 44724 44711 44714 44714 44689 44691 44694 44693 44703 44697 44690 44692 44725
44717 44714 44725 44713 44714 44713 44695 44690 44696 44694 44704 44699 44685 44700 44701
44717 44714 44714 44713 44714 44704 44691 44692 44696 44696 44698 44703 44694 44689 44722
44720 44715 44713 44704 44714 44715 44696 44691 44696 44694 44704 44699 44696 44693 44728
44720 44706 44706 44703 44697 44700 44689 44689 44697 44694 44703 44696 44685 44690 44708
44720 44716 44717 44696 44696 44696 44689 44689 44694 44695 44704 44700 44692 44692 44725
44720 44712 44713 44713 44714 44713 44690 44689 44694 44694 44698 44700 44696 44692 44704
44720 44718 44713 44712 44713 44713 44708 44706 44690 44694 44699 44700 44697 44689 44715
44721 44714 44713 44711 44713 44711 44702 44707 44696 44708 44705 44710 44719 44690 44728
44717 44715 44713 44713 44706 44705 44713 44691 44689 44707 44705 44695 44721 44690 44701
44704 44727 44697 44697 44696 44696 44690 44690 44696 44694 44711 44701 44699 44689 44698
44705 44714 44698 44699 44696 44696 44696 44697 44697 44695 44705 44703 44696 44690 44706
44719 44714 44697 44713 44713 44697 44689 44697 44694 44693 44707 44700 44693 44700 44726
44719 44712 44704 44704 44713 44715 44703 44691 44696 44694 44697 44703 44700 44700 44700
44719 44714 44704 44712 44713 44713 44695 44690 44696 44696 44696 44702 44696 44700 44705
44706 44711 44713 44713 44715 44714 44689 44689 44694 44695 44708 44700 44696 44692 44701

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 44696 bytes 100%
1,000 44692 bytes -4 bytes 100%
10,000 44688 bytes -4 bytes 100%
100,000 44685 bytes -3 bytes 0.58%
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
44782 bytes +97 bytes (+0.22%)
44786 bytes +101 bytes (+0.23%) +4 bytes
44802 bytes +117 bytes (+0.26%) +20 bytes
44826 bytes +141 bytes (+0.32%) +44 bytes
44844 bytes +159 bytes (+0.36%) +62 bytes
44874 bytes +189 bytes (+0.42%) +92 bytes
44855 bytes +170 bytes (+0.38%) +73 bytes
44858 bytes +173 bytes (+0.39%) +76 bytes
44883 bytes +198 bytes (+0.44%) +101 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 35680 bytes -9005 bytes (-20.15%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 37245 bytes -7440 bytes (-16.65%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 39096 bytes -5589 bytes (-12.51%)
Brotli (Wikipedia) brotli brotli -q 11 41106 bytes -3579 bytes (-8.01%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 41835 bytes -2850 bytes (-6.38%)
LZMA2 (Wikipedia) xz xz -9 42460 bytes -2225 bytes (-4.98%)
ZSTD (Wikipedia) zstd zstd -19 43611 bytes -1074 bytes (-2.40%)

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