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
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
  105969 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-2.8.2.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.8.2 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 2.8.2 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 --mls16 --bsr9 --lazy --ohh

(found October 11, 2016)
Description Value Parameter
iterations 10000  --i10000
maximum blocks 8  --mb8
maximum length score 16  --mls16
block splitting recursion 9  --bsr9
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 https://builds.emberjs.com/tags/v2.8.2/ember.min.js --location | md5sum
ed480c235d426b2ccc81fd1532555145  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.8.2.min.zopfli.js.gz | md5sum
ed480c235d426b2ccc81fd1532555145  -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.8.2/ember.min.js --location | sha1sum
80dc7ef6d931328b59499431e2ec8152e48e9050  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.8.2.min.zopfli.js.gz | sha1sum
80dc7ef6d931328b59499431e2ec8152e48e9050  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 136658 bytes ed480c235d426b2ccc81fd1532555145 October 9, 2016 @ 06:25
cdnjs 112082 bytes ed480c235d426b2ccc81fd1532555145 October 7, 2016 @ 03:17
cdnhttps 109956 bytes ed480c235d426b2ccc81fd1532555145 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 -1 byte zopfli --i10000 --mls16 --bsr9 --lazy --ohh October 11, 2016 @ 19:46
105927 bytes -1 byte zopfli --i10000 --mls2 --bsr12 --lazy --ohh October 11, 2016 @ 15:42
105928 bytes -10 bytes zopfli --i10000 --mls2 --bsr16 --lazy --ohh October 11, 2016 @ 08:47
105938 bytes -1 byte zopfli --i1000 --mls2 --bsr16 --lazy --ohh October 11, 2016 @ 06:27
105939 bytes -10 bytes zopfli --i1000 --mls4 --bsr11 --lazy --ohh October 11, 2016 @ 06:18
105949 bytes zopfli --i100 --mls4096 --bsr8 --lazy --ohh October 11, 2016 @ 05:48

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
105928 105928 105933 105938 105990 105933 105933 105933 105937 105934 105932 105932 105953 105930 105937
105931 105930 105934 105930 105928 105929 105933 105928 105929 105930 105933 105927 105940 105938 105939
105928 105927 105928 105928 105951 105929 105933 105928 105928 105929 105928 105929 105941 105937 105940
105950 105950 105928 105928 105928 105928 105928 105928 105928 105931 105933 105929 105939 105936 105937
105934 105933 105933 105930 105933 105934 105932 105934 105930 105928 105928 105929 105938 105936 105937
105927 105928 105928 105926 105928 105928 105928 105928 105927 105928 105928 105928 105936 105937 105936
105932 105933 105928 105928 105932 105928 105933 105928 105927 105929 105928 105929 105938 105937 105940
105929 105928 105928 105928 105928 105928 105928 105928 105928 105929 105929 105929 105939 105936 105939
105927 105928 105928 105928 105927 105928 105928 105928 105927 105928 105928 105928 105939 105940 105939
105927 105928 105928 105926 105927 105928 105928 105927 105928 105928 105928 105929 105936 105937 105940
105927 105928 105928 105954 105928 105928 105928 105928 105928 105927 105928 105929 105939 105935 105937
105928 105927 105928 105928 105928 105928 105928 105928 105928 105931 105934 105929 105939 105935 105942
105928 105928 105939 105928 105928 105928 105928 105927 105927 105931 105932 105934 105936 105941 105939
105928 105928 105928 105929 105928 105928 105929 105928 105932 105931 105932 105933 105931 105937 105939
105928 105928 105928 105928 105928 105928 105928 105927 105928 105927 105928 105929 105938 105935 105939
105929 105928 105928 105928 105928 105928 105928 105927 105927 105931 105932 105930 105939 105937 105939
105928 105959 105958 105928 105928 105928 105928 105927 105927 105929 105933 105932 105938 105940 105939
105932 105959 105928 105936 105932 105928 105932 105928 105927 105929 105933 105927 105940 105936 105939
105928 105927 105928 105928 105928 105928 105933 105928 105928 105929 105928 105928 105939 105937 105939
105928 105927 105926 105928 105928 105928 105928 105928 105928 105929 105928 105928 105939 105941 105938
105927 105928 105928 105928 105929 105929 105928 105928 105928 105929 105928 105928 105937 105937 105938
105929 105927 105928 105928 105928 105929 105928 105928 105928 105930 105928 105929 105940 105936 105939
105928 105928 105928 105926 105928 105928 105928 105928 105927 105929 105928 105929 105940 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 105949 bytes 100%
1,000 105938 bytes -11 bytes 100%
10,000 105926 bytes -12 bytes 100%
100,000 105926 bytes 10.14%
1,000,000 105926 bytes 1.16%
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
105986 bytes +60 bytes (+0.06%) +17 bytes
105972 bytes +46 bytes (+0.04%) +3 bytes
106015 bytes +89 bytes (+0.08%) +46 bytes
105969 bytes +43 bytes (+0.04%)
106027 bytes +101 bytes (+0.10%) +58 bytes
106076 bytes +150 bytes (+0.14%) +107 bytes
106122 bytes +196 bytes (+0.19%) +153 bytes
106146 bytes +220 bytes (+0.21%) +177 bytes
106208 bytes +282 bytes (+0.27%) +239 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
However, support for Brotli is constantly growing - but your browser doesn't support it.
Algorithm Program Parameters Size Compared To Best Zopfli
ZPAQ (Wikipedia) zpaq zpaq -method 69 72907 bytes -33019 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 88664 bytes -17262 bytes (-16.30%)
Brotli (Wikipedia) brotli brotli -q 11 92776 bytes -13150 bytes (-12.41%)
LZMA2 (Wikipedia) xz xz -9 94928 bytes -10998 bytes (-10.38%)
Zstandard (Wikipedia) zstd zstd -19 97514 bytes -8412 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