Choose a version:
26% The original file has 1614516 bytes (1,576.7k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 419565 bytes (409.7k, 26%).

After GZIP compression these minified files vary in size:
Boot
  136658 bytes (133.5k)
CDN
cdnjs
  112082 bytes (109.5k)
CDN
gzip -6 (default)
  110508 bytes (107.9k)
local copy
gzip -9
  110149 bytes (107.6k)
local copy
jsdelivr
  110033 bytes (107.5k)
CDN
cdnhttps
  109956 bytes (107.4k)
CDN
7zip -mx=9 -tgzip
  106308 bytes (103.8k)
local copy
pigz -11 -n
  106181 bytes (103.7k)
local copy
libdeflate -12
  106100 bytes (103.6k)
local copy
kzip -s0 -rn -b3
  105959 bytes (103.5k)
local copy
Zopfli
  105926 bytes (103.4k)
local copy
Zopfli (defluff)
  105925 bytes (103.4k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.9.0.min.js

You will automatically get the smallest Ember 2.9.0 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 4030 bytes by using my Ember 2.9.0 Zopfli version instead of the best available CDN (3.80% smaller than cdnhttps, 105926 vs. 109956 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 --i10000 --mb8 --mls2 --bsr18 --lazy --ohh

(found October 18, 2016)
Description Value Parameter
iterations 10000  --i10000
maximum blocks 8  --mb8
maximum length score 2  --mls2
block splitting recursion 18  --bsr18
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 (105925 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v2.9.0/ember.min.js --location | md5sum
af783b066f8ace26f63d4c39286ff436  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.9.0.min.zopfli.js.gz | md5sum
af783b066f8ace26f63d4c39286ff436  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v2.9.0/ember.min.js --location | sha1sum
4853ded744d817bffb6125f715102039f56e18fc  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.9.0.min.zopfli.js.gz | sha1sum
4853ded744d817bffb6125f715102039f56e18fc  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 136658 bytes af783b066f8ace26f63d4c39286ff436 October 20, 2016 @ 10:34
cdnjs 112082 bytes af783b066f8ace26f63d4c39286ff436 October 18, 2016 @ 08:17
jsdelivr 110033 bytes af783b066f8ace26f63d4c39286ff436 October 18, 2016 @ 08:04
cdnhttps 109956 bytes af783b066f8ace26f63d4c39286ff436 November 22, 2016 @ 16:33

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

Other Versions

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

3.0.0,
2.18.2, 2.18.1, 2.18.0,
2.17.2, 2.17.1, 2.17.0,
2.16.2, 2.16.1, 2.16.0,
2.15.3, 2.15.2, 2.15.1, 2.15.0,
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
105926 bytes -12 bytes zopfli --i10000 --mls2 --bsr18 --lazy --ohh October 18, 2016 @ 13:05
105938 bytes -1 byte zopfli --i1000 --mls2 --bsr16 --lazy --ohh October 18, 2016 @ 11:52
105939 bytes -11 bytes zopfli --i1000 --mls2 --bsr40 --lazy --ohh October 18, 2016 @ 11:52
105950 bytes zopfli --i100 --mls2 --bsr18 --lazy --ohh October 18, 2016 @ 11:42

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 @ 15:27.

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
105926 105926 105932 105938 105990 105933 105934 105933 105933 105943 105934 105932 105938 105930 105937
105929 105928 105942 105929 105926 105927 105926 105927 105926 105933 105933 105926 105938 105937 105937
105926 105926 105926 105926 105926 105927 105927 105926 105926 105930 105926 105929 105940 105936 105939
105927 105927 105926 105926 105927 105926 105926 105926 105926 105933 105933 105927 105936 105936 105937
105931 105932 105931 105928 105930 105933 105926 105926 105928 105928 105926 105927 105936 105936 105936
105926 105926 105926 105926 105926 105926 105926 105926 105926 105928 105927 105926 105935 105936 105935
105930 105931 105926 105926 105930 105926 105926 105926 105927 105930 105927 105927 105936 105937 105939
105926 105927 105927 105926 105926 105926 105926 105926 105926 105930 105926 105927 105937 105935 105939
105926 105927 105926 105926 105926 105926 105926 105926 105926 105928 105926 105926 105937 105940 105937
105926 105926 105927 105926 105926 105926 105926 105926 105926 105927 105926 105927 105935 105937 105938
105926 105926 105926 105955 105926 105926 105926 105926 105926 105926 105926 105928 105937 105935 105937
105926 105926 105926 105926 105926 105926 105926 105926 105926 105933 105936 105926 105936 105935 105940
105926 105927 105926 105926 105927 105926 105926 105926 105926 105933 105933 105935 105935 105939 105937
105927 105926 105927 105927 105926 105926 105927 105926 105930 105933 105932 105933 105930 105937 105937
105926 105927 105926 105926 105926 105926 105926 105926 105926 105928 105927 105928 105937 105935 105938
105926 105927 105926 105926 105927 105926 105927 105926 105926 105933 105933 105931 105936 105937 105938
105926 105960 105930 105926 105926 105926 105926 105926 105926 105936 105933 105930 105935 105939 105938
105930 105958 105926 105937 105930 105926 105930 105926 105926 105930 105933 105926 105938 105936 105937
105926 105926 105927 105926 105927 105926 105926 105926 105926 105930 105926 105926 105937 105936 105939
105926 105926 105926 105926 105926 105926 105926 105926 105926 105930 105926 105927 105937 105940 105936
105926 105926 105927 105926 105927 105927 105926 105926 105926 105936 105927 105926 105936 105937 105937
105926 105926 105927 105926 105926 105927 105926 105926 105926 105929 105926 105926 105938 105936 105937
105926 105926 105927 105926 105926 105926 105926 105926 105926 105930 105927 105928 105938 105935 105939

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 105950 bytes 100%
1,000 105938 bytes -12 bytes 100%
10,000 105926 bytes -12 bytes 100%
100,000 105926 bytes 0.87%
1,000,000 105926 bytes 0.29%
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
105980 bytes +54 bytes (+0.05%) +21 bytes
105982 bytes +56 bytes (+0.05%) +23 bytes
106004 bytes +78 bytes (+0.07%) +45 bytes
105959 bytes +33 bytes (+0.03%)
106028 bytes +102 bytes (+0.10%) +69 bytes
106059 bytes +133 bytes (+0.13%) +100 bytes
106110 bytes +184 bytes (+0.17%) +151 bytes
106157 bytes +231 bytes (+0.22%) +198 bytes
106207 bytes +281 bytes (+0.27%) +248 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 72905 bytes -33021 bytes (-31.17%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 77832 bytes -28094 bytes (-26.52%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 83530 bytes -22396 bytes (-21.14%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 88635 bytes -17291 bytes (-16.32%)
Brotli (Wikipedia) brotli brotli -q 11 92820 bytes -13106 bytes (-12.37%)
LZMA2 (Wikipedia) xz xz -9 94928 bytes -10998 bytes (-10.38%)
ZSTD (Wikipedia) zstd zstd -19 97515 bytes -8411 bytes (-7.94%)

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 2018.
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