Choose a version:
29% The original file has 1852253 bytes (1,808.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 530735 bytes (518.3k, 29%).

After GZIP compression these minified files vary in size:
Boot
  162971 bytes (159.2k)
CDN
cdnjs
  133091 bytes (130.0k)
CDN
gzip -6 (default)
  131263 bytes (128.2k)
local copy
gzip -9
  130789 bytes (127.7k)
local copy
7zip -mx=9 -tgzip
  126264 bytes (123.3k)
local copy
pigz -11 -n
  126032 bytes (123.1k)
local copy
libdeflate -12
  126004 bytes (123.1k)
local copy
kzip -s0 -rn -b5
  125782 bytes (122.8k)
local copy
Zopfli
  125741 bytes (122.8k)
local copy
Zopfli (defluff)
  125737 bytes (122.8k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.11.1.min.js

You will automatically get the smallest Ember 2.11.1 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 7350 bytes by using my Ember 2.11.1 Zopfli version instead of the best available CDN (5.85% smaller than cdnjs, 125741 vs. 133091 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 --mls16384 --bsr8 --lazy --ohh

(found February 17, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 16384  --mls16384
block splitting recursion 8  --bsr8
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 4 more bytes (125737 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v2.11.1/ember.min.js --location | md5sum
1a09d489748ec65217e49db4021b9d75  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.11.1.min.zopfli.js.gz | md5sum
1a09d489748ec65217e49db4021b9d75  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v2.11.1/ember.min.js --location | sha1sum
58cef59fe403e1549019e31c984dae623e54ed48  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.11.1.min.zopfli.js.gz | sha1sum
58cef59fe403e1549019e31c984dae623e54ed48  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 162971 bytes 1a09d489748ec65217e49db4021b9d75 February 27, 2017 @ 18:45
cdnjs 133091 bytes 1a09d489748ec65217e49db4021b9d75 February 16, 2017 @ 17:33

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
125741 bytes -3 bytes zopfli --i100000 --mls16384 --bsr8 --lazy --ohh February 17, 2017 @ 22:19
125744 bytes -1 byte zopfli --i10000 --mls16384 --bsr8 --lazy --ohh February 17, 2017 @ 15:51
125745 bytes -3 bytes zopfli --i100000 --mls16384 --bsr9 --lazy --ohh February 17, 2017 @ 14:26
125748 bytes -7 bytes zopfli --i10000 --mls16384 --bsr9 --lazy --ohh February 17, 2017 @ 11:32
125755 bytes -1 byte zopfli --i1000 --mls16384 --bsr9 --lazy --ohh February 17, 2017 @ 11:07
125756 bytes -9 bytes zopfli --i1000 --mls16384 --bsr8 --lazy --ohh February 17, 2017 @ 11:05
125765 bytes -29 bytes zopfli --i1000 --mls16384 --bsr4 --lazy --ohh February 17, 2017 @ 10:58
125794 bytes zopfli --i100 --mls16384 --bsr4 --lazy --ohh February 17, 2017 @ 02:16

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

Most recent activity on February 27, 2017 @ 18:45.

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
125879 125879 125879 125879 125885 125879 125885 125879 125804 125843 125880 125880 125887 125832 125882
125813 125815 125816 125879 125885 125879 125885 125812 125814 125755 125811 125880 125887 125752 125882
125825 125826 125823 125823 125827 125826 125821 125825 125826 125777 125798 125812 125813 125754 125809
125766 125816 125829 125820 125820 125822 125821 125821 125800 125799 125771 125880 125887 125814 125821
125826 125826 125821 125823 125821 125823 125818 125821 125803 125798 125804 125764 125807 125741 125809
125824 125820 125823 125826 125827 125822 125821 125821 125821 125785 125789 125764 125804 125745 125818
125825 125823 125829 125821 125829 125821 125821 125821 125821 125779 125781 125804 125805 125765 125809
125818 125820 125823 125820 125824 125822 125820 125820 125821 125790 125817 125765 125804 125762 125809
125829 125826 125829 125817 125821 125821 125824 125823 125823 125785 125790 125770 125801 125766 125811
125826 125824 125823 125820 125820 125828 125821 125820 125820 125782 125816 125808 125817 125762 125809
125826 125824 125823 125821 125810 125814 125813 125820 125821 125807 125778 125808 125804 125763 125809
125826 125824 125824 125821 125820 125821 125821 125820 125821 125789 125797 125768 125816 125761 125827
125825 125825 125820 125823 125821 125821 125821 125820 125820 125782 125791 125786 125808 125759 125808
125825 125826 125824 125823 125820 125827 125821 125820 125816 125788 125779 125768 125804 125759 125821
125825 125821 125823 125820 125820 125825 125826 125820 125821 125790 125771 125766 125816 125767 125809
125822 125822 125822 125821 125824 125827 125824 125820 125820 125779 125776 125779 125802 125815 125809
125825 125830 125823 125820 125821 125827 125821 125822 125823 125779 125775 125807 125804 125763 125825
125826 125824 125824 125820 125820 125822 125821 125826 125823 125792 125772 125768 125802 125777 125809
125824 125820 125823 125822 125820 125822 125821 125820 125821 125778 125833 125771 125804 125760 125809
125826 125824 125823 125820 125824 125821 125821 125822 125821 125781 125778 125766 125823 125761 125808
125826 125824 125823 125819 125821 125821 125821 125821 125821 125785 125772 125766 125804 125760 125809
125826 125824 125822 125820 125824 125822 125821 125833 125821 125797 125793 125769 125805 125763 125809
125825 125821 125823 125820 125827 125822 125821 125821 125816 125797 125770 125769 125807 125762 125809

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 125794 bytes 100%
1,000 125755 bytes -39 bytes 100%
10,000 125744 bytes -11 bytes 100%
100,000 125741 bytes -3 bytes 0.87%
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
125838 bytes +97 bytes (+0.08%) +56 bytes
125871 bytes +130 bytes (+0.10%) +89 bytes
125897 bytes +156 bytes (+0.12%) +115 bytes
125883 bytes +142 bytes (+0.11%) +101 bytes
125834 bytes +93 bytes (+0.07%) +52 bytes
125782 bytes +41 bytes (+0.03%)
125844 bytes +103 bytes (+0.08%) +62 bytes
125872 bytes +131 bytes (+0.10%) +90 bytes
125891 bytes +150 bytes (+0.12%) +109 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 85100 bytes -40641 bytes (-32.32%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 92067 bytes -33674 bytes (-26.78%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 95721 bytes -30020 bytes (-23.87%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 105951 bytes -19790 bytes (-15.74%)
Brotli (Wikipedia) brotli brotli -q 11 109309 bytes -16432 bytes (-13.07%)
LZMA2 (Wikipedia) xz xz -9 111304 bytes -14437 bytes (-11.48%)
ZSTD (Wikipedia) zstd zstd -19 114693 bytes -11048 bytes (-8.79%)

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