Choose a version:
13% The original file has 1232632 bytes (1,203.7k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 166022 bytes (162.1k, 13%).

After GZIP compression these minified files vary in size:
Boot
  66961 bytes (65.4k)
CDN, direct link
cdnjs
  58451 bytes (57.1k)
CDN, direct link
Google
  58281 bytes (56.9k)
CDN, direct link
unpkg
  57999 bytes (56.6k)
CDN, direct link
gzip -6 (default)
  57995 bytes (56.6k)
local copy
gzip -9
  57873 bytes (56.5k)
local copy
7zip -mx=9 -tgzip
  56110 bytes (54.8k)
local copy
kzip -s0 -rn -b0
  56094 bytes (54.8k)
local copy
libdeflate -12
  56092 bytes (54.8k)
local copy
pigz -11 -n
  56023 bytes (54.7k)
local copy
Zopfli
  55966 bytes (54.7k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.6.1.min.js

You will automatically get the smallest AngularJS 1.6.1 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 2033 bytes by using my AngularJS 1.6.1 Zopfli version instead of the best available CDN (3.63% smaller than unpkg, 55966 vs. 57999 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 --mls1024 --bsr21 --lazy --ohh

(found December 26, 2016)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 1024  --mls1024
block splitting recursion 21  --bsr21
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/1.6.1/angular.min.js --location | md5sum
ed0ac421e5a640435b2900389405ccc6  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.6.1.min.zopfli.js.gz | md5sum
ed0ac421e5a640435b2900389405ccc6  -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.6.1/angular.min.js --location | sha1sum
d1592f45531b8c471048606c1b1607f69034d4d9  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.6.1.min.zopfli.js.gz | sha1sum
d1592f45531b8c471048606c1b1607f69034d4d9  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 66961 bytes ed0ac421e5a640435b2900389405ccc6 December 23, 2016 @ 20:03
cdnjs 58451 bytes ed0ac421e5a640435b2900389405ccc6 December 23, 2016 @ 13:32
Google 58281 bytes ed0ac421e5a640435b2900389405ccc6 December 24, 2016 @ 12:15
unpkg 57999 bytes ed0ac421e5a640435b2900389405ccc6 December 26, 2016 @ 07:33

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
55966 bytes -2 bytes zopfli --i1000000 --mls1024 --bsr21 --lazy --ohh December 26, 2016 @ 23:41
55968 bytes -5 bytes zopfli --i100000 --mls1024 --bsr21 --lazy --ohh December 26, 2016 @ 08:58
55973 bytes -1 byte zopfli --i10000 --mls1024 --bsr21 --lazy --ohh December 26, 2016 @ 07:57
55974 bytes -3 bytes zopfli --i10000 --mls1024 --bsr15 --lazy --ohh December 26, 2016 @ 07:52
55977 bytes -1 byte zopfli --i1000 --mls1024 --bsr22 --lazy --ohh December 26, 2016 @ 07:50
55978 bytes -1 byte zopfli --i1000 --mls1024 --bsr15 --lazy --ohh December 26, 2016 @ 07:45
55979 bytes -4 bytes zopfli --i1000 --mls256 --bsr12 --lazy --ohh December 26, 2016 @ 07:45
55983 bytes zopfli --i100 --mls256 --bsr12 --lazy --ohh December 26, 2016 @ 07:35

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

Most recent activity on January 25, 2017 @ 15:23.

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
56020 56021 56019 56020 56021 56021 56015 56014 56013 56022 56017 56000 56003 56000 56018
56007 56009 56007 56011 55992 56004 55997 55986 56005 55995 55984 55986 55994 55992 55995
56013 56011 56005 56006 56002 56003 55995 55989 55987 55995 55994 55996 55995 55994 55995
56018 56001 56006 56001 56003 55998 55993 56007 55982 55991 55986 55994 56007 55989 55999
56001 56001 56004 56005 55994 55999 55983 55985 55996 56001 55984 55989 56004 55986 55996
56011 56010 56000 56004 55995 55999 55995 55990 55999 55984 55996 55996 55996 55994 56002
56005 56008 55998 56006 56001 55987 55984 55984 55974 55986 55973 55996 55998 55991 55992
55993 55993 55995 55998 55991 55991 55981 55985 55980 55985 55986 55996 55984 55991 55999
56005 56005 56004 56005 55988 55990 55987 55975 55975 55986 55974 55996 55989 55992 56001
56003 55996 55993 56005 55997 56000 55984 55977 55974 55986 55984 55996 56001 55981 55990
55998 56001 56002 56006 55997 55981 55979 55985 55976 55976 55975 55996 56003 55998 56002
56005 56003 56001 56004 55995 55995 56002 55988 55970 55974 55985 55996 56004 55983 56007
55994 55993 55995 56004 55995 55984 55986 55986 55976 55973 55988 55996 55998 55992 55997
55994 56009 55989 56001 55993 55990 55979 55984 55979 55979 55982 55990 56006 55995 55995
56005 55995 56005 56000 55986 55994 55984 55989 55979 55974 55982 55984 56001 55993 55996
55994 56003 56004 55997 55989 55990 55981 55990 55976 55966 55982 55996 56006 55981 56001
56001 56012 55996 56001 55995 55990 55974 55993 55976 55979 55985 55996 56004 55993 55997
56008 56001 55999 56001 55986 56006 55983 55984 55976 55966 55973 55983 55998 55992 56000
56002 55994 55991 56005 55998 55990 55975 55984 55974 55974 55974 55996 55998 55991 55998
56013 56002 55992 56003 55997 55991 55984 55975 55976 55974 55973 55985 56006 55979 56001
55998 55993 55990 56000 55995 55990 55985 55978 55980 55994 55985 55995 56001 55989 56000
55998 55999 55993 55996 55985 55989 55983 55985 55976 55983 55978 55995 55996 55993 56002
56000 55999 55995 55988 55981 55986 55969 55970 55975 55974 55973 55983 55998 55983 55998

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 55983 bytes 100%
1,000 55977 bytes -6 bytes 100%
10,000 55971 bytes -6 bytes 100%
100,000 55968 bytes -3 bytes 1.45%
1,000,000 55966 bytes -2 bytes 0.58%
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
56094 bytes +128 bytes (+0.23%)
56097 bytes +131 bytes (+0.23%) +3 bytes
56101 bytes +135 bytes (+0.24%) +7 bytes
56120 bytes +154 bytes (+0.28%) +26 bytes
56133 bytes +167 bytes (+0.30%) +39 bytes
56126 bytes +160 bytes (+0.29%) +32 bytes
56135 bytes +169 bytes (+0.30%) +41 bytes
56155 bytes +189 bytes (+0.34%) +61 bytes
56165 bytes +199 bytes (+0.36%) +71 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 43217 bytes -12749 bytes (-22.78%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 45718 bytes -10248 bytes (-18.31%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 47358 bytes -8608 bytes (-15.38%)
Brotli (Wikipedia) brotli brotli -q 11 50725 bytes -5241 bytes (-9.36%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 51612 bytes -4354 bytes (-7.78%)
LZMA2 (Wikipedia) xz xz -9 52304 bytes -3662 bytes (-6.54%)
ZSTD (Wikipedia) zstd zstd -19 53823 bytes -2143 bytes (-3.83%)

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