Choose a version:
27% The original file has 1843825 bytes (1,800.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 499882 bytes (488.2k, 27%).

After GZIP compression these minified files vary in size:
Boot
  156701 bytes (153.0k)
CDN, direct link
gzip -6 (default)
  126803 bytes (123.8k)
local copy
gzip -9
  126373 bytes (123.4k)
local copy
cdnhttps
  126260 bytes (123.3k)
CDN, direct link
cdnjs
  126260 bytes (123.3k)
CDN, direct link
jsdelivr
  126260 bytes (123.3k)
CDN, direct link
7zip -mx=9 -tgzip
  122376 bytes (119.5k)
local copy
libdeflate -12
  122137 bytes (119.3k)
local copy
pigz -11 -n
  121929 bytes (119.1k)
local copy
kzip -s0 -rn -b0
  121836 bytes (119.0k)
local copy
Zopfli
  121742 bytes (118.9k)
local copy
Zopfli (defluff)
  121740 bytes (118.9k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-1.13.13.min.js

You will automatically get the smallest Ember 1.13.13 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 4518 bytes by using my Ember 1.13.13 Zopfli version instead of the best available CDN (3.71% smaller than jsdelivr, 121742 vs. 126260 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 --mls2 --bsr12 --lazy --ohh

(found January 26, 2016)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 2  --mls2
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 2 more bytes (121740 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v1.13.13/ember.min.js --location | md5sum
eeea1685b0ff174d3724cb2dc07669cd  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.13.13.min.zopfli.js.gz | md5sum
eeea1685b0ff174d3724cb2dc07669cd  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v1.13.13/ember.min.js --location | sha1sum
9a29c3d8a37b2acb3dadb581fb334f5e4f4c59e9  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.13.13.min.zopfli.js.gz | sha1sum
9a29c3d8a37b2acb3dadb581fb334f5e4f4c59e9  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 156701 bytes eeea1685b0ff174d3724cb2dc07669cd January 18, 2016 @ 16:27
cdnhttps 126260 bytes eeea1685b0ff174d3724cb2dc07669cd November 22, 2016 @ 16:33
cdnjs 126260 bytes eeea1685b0ff174d3724cb2dc07669cd January 18, 2016 @ 07:02
jsdelivr 126260 bytes eeea1685b0ff174d3724cb2dc07669cd January 18, 2016 @ 05:33

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

Other Versions

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

2.14.1, 2.14.0,
2.13.4, 2.13.3, 2.13.2, 2.13.1, 2.13.0,
2.12.2, 2.12.1, 2.12.0,
2.11.3, 2.11.2, 2.11.1, 2.11.0,
2.10.2, 2.10.1, 2.10.0,
2.9.1, 2.9.0,
2.8.3, 2.8.2, 2.8.1, 2.8.0,
2.7.3, 2.7.2, 2.7.1, 2.7.0,
2.6.2, 2.6.1, 2.6.0,
2.5.1, 2.5.0,
2.4.6, 2.4.5, 2.4.4, 2.4.3, 2.4.2, 2.4.1, 2.4.0,
2.3.1, 2.3.0,
2.2.2, 2.2.1, 2.2.0,
2.1.2, 2.1.1, 2.1.0,
2.0.3, 2.0.2, 2.0.1, 2.0.0,
1.13.13, 1.13.12, 1.13.11, 1.13.10, 1.13.9, 1.13.8, 1.13.7, 1.13.6, 1.13.5, 1.13.4, 1.13.3, 1.13.2, 1.13.1, 1.13.0,
1.12.2, 1.12.1, 1.12.0,
1.11.4, 1.11.3, 1.11.2, 1.11.1, 1.11.0,
1.10.1, 1.10.0,
1.9.1, 1.9.0,
1.8.1, 1.8.0,
1.7.1, 1.7.0,
1.6.1, 1.6.0,
1.5.1, 1.5.0,
1.4.0,
1.3.2, 1.3.1, 1.3.0,
1.2.2, 1.2.1, 1.2.0,
1.0.1, 1.0.0

The project site contains an overview how well these versions were compressed.
Other interesting projects are AngularJS, BackboneJS, Bootstrap, D3, Dojo, jQuery, Knockout, lodash, React, Socket.IO, ThreeJS, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:
Size Improvement Parameters Found
121742 bytes -5 bytes zopfli --i100000 --mls2 --bsr12 --lazy --ohh January 26, 2016 @ 17:39
121747 bytes -5 bytes zopfli --i10000 --mls2 --bsr12 --lazy --ohh January 26, 2016 @ 08:47
121752 bytes -8 bytes zopfli --i10000 --mls512 --bsr7 --lazy --ohh January 26, 2016 @ 02:20
121760 bytes -2 bytes zopfli --i10000 --mls64 --bsr7 --lazy --ohh January 26, 2016 @ 01:44
121762 bytes -11 bytes zopfli --i10000 --mls16384 --bsr6 --lazy --ohh January 25, 2016 @ 10:18
121773 bytes -27 bytes zopfli --i1000 --mls16384 --bsr6 --lazy --ohh January 25, 2016 @ 09:46
121800 bytes zopfli --i100 --mls16384 --bsr6 --lazy --ohh January 25, 2016 @ 08:56

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

Most recent activity on March 25, 2017 @ 16:37.

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
121843 121915 121845 121841 121849 121841 121964 121921 121946 121917 121919 121965 121952 121965 121919
121790 121790 121789 121802 121814 121809 121818 121765 121805 121789 121796 121965 121952 121748 121913
121782 121805 121813 121808 121812 121790 121765 121770 121760 121762 121900 121965 121952 121762 121820
121785 121821 121810 121817 121902 121760 121789 121763 121749 121774 121902 121965 121952 121749 121897
121782 121804 121815 121800 121894 121762 121903 121899 121941 121894 121904 121965 121899 121893 121903
121757 121767 121761 121761 121762 121761 121903 121901 121894 121893 121894 121892 121899 121895 121903
121765 121786 121771 121765 121895 121896 121899 121899 121894 121894 121893 121891 121898 121893 121898
121806 121803 121804 121818 121892 121766 121903 121906 121900 121893 121894 121891 121898 121893 121901
121742 121761 121772 121769 121765 121760 121892 121901 121900 121893 121894 121892 121897 121893 121912
121805 121803 121811 121819 121890 121892 121903 121899 121895 121893 121894 121891 121898 121893 121904
121779 121784 121796 121782 121766 121766 121903 121899 121900 121893 121902 121897 121894 121893 121898
121824 121804 121811 121804 121765 121787 121903 121899 121893 121893 121894 121891 121893 121897 121903
121804 121765 121815 121808 121891 121896 121891 121896 121901 121895 121894 121891 121899 121893 121903
121808 121798 121813 121809 121892 121761 121892 121899 121893 121893 121894 121892 121897 121893 121906
121825 121804 121814 121819 121896 121762 121903 121893 121900 121893 121894 121891 121896 121893 121904
121781 121770 121769 121762 121893 121894 121903 121898 121898 121895 121894 121892 121892 121898 121904
121792 121820 121811 121823 121892 121764 121892 121893 121900 121893 121894 121891 121899 121893 121898
121805 121808 121810 121817 121766 121764 121903 121901 121894 121893 121894 121892 121898 121893 121901
121821 121819 121804 121804 121892 121896 121895 121899 121894 121894 121894 121891 121893 121893 121904
121829 121812 121812 121805 121765 121762 121903 121897 121900 121892 121894 121892 121899 121893 121902
121819 121803 121815 121803 121763 121788 121903 121901 121894 121893 121894 121891 121894 121894 121903
121807 121809 121814 121804 121764 121780 121903 121898 121894 121893 121893 121891 121894 121913 121903
121824 121806 121805 121819 121898 121779 121903 121898 121894 121893 121894 121892 121899 121893 121903

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 121800 bytes 100%
1,000 121773 bytes -27 bytes 100%
10,000 121747 bytes -26 bytes 100%
100,000 121742 bytes -5 bytes 1.45%
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
121836 bytes +94 bytes (+0.08%)
121948 bytes +206 bytes (+0.17%) +112 bytes
121980 bytes +238 bytes (+0.20%) +144 bytes
121907 bytes +165 bytes (+0.14%) +71 bytes
121874 bytes +132 bytes (+0.11%) +38 bytes
121857 bytes +115 bytes (+0.09%) +21 bytes
121901 bytes +159 bytes (+0.13%) +65 bytes
121911 bytes +169 bytes (+0.14%) +75 bytes
122004 bytes +262 bytes (+0.22%) +168 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 82820 bytes -38922 bytes (-31.97%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 89009 bytes -32733 bytes (-26.89%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 96446 bytes -25296 bytes (-20.78%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 101324 bytes -20418 bytes (-16.77%)
Brotli (Wikipedia) brotli brotli -q 11 105782 bytes -15960 bytes (-13.11%)
LZMA2 (Wikipedia) xz xz -9 108040 bytes -13702 bytes (-11.25%)
ZSTD (Wikipedia) zstd zstd -19 111157 bytes -10585 bytes (-8.69%)

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