Choose a version:
28% The original file has 1442378 bytes (1,408.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 407681 bytes (398.1k, 28%).

After GZIP compression these minified files vary in size:
Boot
  131193 bytes (128.1k)
CDN, direct link
jsdelivr
  131193 bytes (128.1k)
CDN, direct link
cdnjs
  107792 bytes (105.3k)
CDN, direct link
gzip -6 (default)
  106379 bytes (103.9k)
local copy
cdnhttps
  106235 bytes (103.7k)
CDN, direct link
gzip -9
  106063 bytes (103.6k)
local copy
7zip -mx=9 -tgzip
  102501 bytes (100.1k)
local copy
libdeflate -12
  102352 bytes (100.0k)
local copy
pigz -11 -n
  102289 bytes (99.9k)
local copy
kzip -s0 -rn -b0
  102093 bytes (99.7k)
local copy
Zopfli
  102059 bytes (99.7k)
local copy
Zopfli (defluff)
  102056 bytes (99.7k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-1.11.0.min.js

You will automatically get the smallest Ember 1.11.0 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 4176 bytes by using my Ember 1.11.0 Zopfli version instead of the best available CDN (4.09% smaller than cdnhttps, 102059 vs. 106235 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 --mls256 --bsr30 --lazy --ohh

(found July 21, 2016)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 256  --mls256
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 3 more bytes (102056 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v1.11.0/ember.min.js --location | md5sum
c4e3b821600a4efdb91b81c4fda2414d  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.11.0.min.zopfli.js.gz | md5sum
c4e3b821600a4efdb91b81c4fda2414d  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v1.11.0/ember.min.js --location | sha1sum
579be0ca8878bf994b7289ca42b8d0d51ea9d74f  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.11.0.min.zopfli.js.gz | sha1sum
579be0ca8878bf994b7289ca42b8d0d51ea9d74f  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 131193 bytes c4e3b821600a4efdb91b81c4fda2414d March 30, 2015 @ 10:38
jsdelivr 131193 bytes c4e3b821600a4efdb91b81c4fda2414d March 28, 2015 @ 22:06
cdnjs 107792 bytes c4e3b821600a4efdb91b81c4fda2414d March 29, 2015 @ 11:00
cdnhttps 106235 bytes c4e3b821600a4efdb91b81c4fda2414d December 24, 2015 @ 07:33

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

Other Versions

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

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
102059 bytes -4 bytes zopfli --i100000 --mls256 --bsr30 --lazy --ohh July 21, 2016 @ 21:43
102063 bytes -9 bytes zopfli --i10000 --mls256 --bsr11 --lazy --ohh October 1, 2015 @ 10:19
102072 bytes -1 byte zopfli --i1000 --mls256 --bsr11 --lazy --ohh October 1, 2015 @ 01:53
102073 bytes -5 bytes zopfli --i1000 --mls256 --bsr19 --lazy --ohh October 1, 2015 @ 01:31
102078 bytes -5 bytes zopfli --i1000 --mls32768 --bsr14 --lazy --ohh September 30, 2015 @ 23:51
102083 bytes zopfli --i100 --mls32768 --bsr9 --lazy --ohh September 30, 2015 @ 10:51

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

Most recent activity on March 28, 2017 @ 05:09.

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
102103 102068 102103 102106 102108 102105 102132 102132 102132 102105 102111 102110 102109 102128 102110
102071 102072 102069 102068 102068 102072 102065 102064 102064 102070 102061 102073 102071 102080 102068
102105 102107 102131 102086 102104 102105 102103 102100 102109 102101 102102 102107 102104 102128 102098
102067 102066 102070 102070 102068 102064 102063 102064 102098 102065 102063 102102 102073 102079 102070
102076 102068 102069 102070 102070 102063 102064 102064 102064 102064 102068 102064 102070 102080 102072
102064 102067 102066 102066 102063 102064 102064 102064 102063 102070 102063 102063 102072 102078 102064
102070 102070 102070 102069 102068 102064 102063 102064 102064 102065 102068 102064 102070 102074 102074
102065 102063 102069 102063 102063 102064 102070 102059 102064 102065 102064 102069 102065 102074 102070
102076 102064 102063 102063 102063 102064 102064 102064 102064 102065 102063 102063 102071 102078 102070
102060 102063 102068 102063 102064 102064 102063 102064 102064 102065 102064 102064 102065 102075 102070
102069 102070 102070 102071 102063 102064 102064 102064 102064 102065 102068 102064 102071 102077 102065
102067 102063 102069 102070 102068 102064 102064 102064 102064 102064 102068 102063 102070 102080 102074
102063 102063 102064 102064 102065 102067 102063 102064 102064 102065 102070 102063 102065 102074 102072
102069 102066 102069 102070 102068 102066 102063 102066 102064 102065 102064 102063 102063 102073 102109
102060 102065 102069 102069 102069 102064 102065 102064 102064 102064 102063 102063 102152 102078 102070
102066 102063 102070 102063 102068 102064 102063 102064 102064 102064 102064 102063 102065 102075 102071
102073 102063 102063 102065 102063 102062 102064 102064 102064 102065 102068 102069 102064 102078 102070
102066 102063 102063 102063 102063 102064 102063 102064 102064 102065 102068 102063 102070 102073 102070
102066 102064 102063 102065 102063 102064 102064 102064 102064 102065 102064 102069 102070 102079 102064
102066 102063 102064 102063 102063 102064 102064 102059 102064 102065 102068 102069 102065 102078 102070
102066 102063 102063 102063 102063 102064 102064 102064 102064 102065 102068 102069 102071 102078 102070
102064 102069 102064 102065 102071 102066 102063 102059 102064 102064 102067 102062 102070 102080 102070
102064 102063 102069 102068 102068 102064 102064 102064 102064 102065 102064 102064 102067 102078 102071

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 102083 bytes 100%
1,000 102072 bytes -11 bytes 100%
10,000 102061 bytes -11 bytes 100%
100,000 102059 bytes -2 bytes 2.03%
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
102093 bytes +34 bytes (+0.03%)
102099 bytes +40 bytes (+0.04%) +6 bytes
102137 bytes +78 bytes (+0.08%) +44 bytes
102179 bytes +120 bytes (+0.12%) +86 bytes
102226 bytes +167 bytes (+0.16%) +133 bytes
102225 bytes +166 bytes (+0.16%) +132 bytes
102262 bytes +203 bytes (+0.20%) +169 bytes
102245 bytes +186 bytes (+0.18%) +152 bytes
102231 bytes +172 bytes (+0.17%) +138 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 70600 bytes -31459 bytes (-30.82%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 75162 bytes -26897 bytes (-26.35%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 79593 bytes -22466 bytes (-22.01%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 85499 bytes -16560 bytes (-16.23%)
Brotli (Wikipedia) brotli brotli -q 11 89497 bytes -12562 bytes (-12.31%)
LZMA2 (Wikipedia) xz xz -9 91340 bytes -10719 bytes (-10.50%)
ZSTD (Wikipedia) zstd zstd -19 93901 bytes -8158 bytes (-7.99%)

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