Choose a version:
29% The original file has 1852178 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 530697 bytes (518.3k, 29%).

After GZIP compression these minified files vary in size:
Boot
  162952 bytes (159.1k)
CDN, direct link
cdnjs
  133074 bytes (130.0k)
CDN, direct link
gzip -6 (default)
  131245 bytes (128.2k)
local copy
gzip -9
  130771 bytes (127.7k)
local copy
jsdelivr
  130652 bytes (127.6k)
CDN, direct link
7zip -mx=9 -tgzip
  126219 bytes (123.3k)
local copy
pigz -11 -n
  126023 bytes (123.1k)
local copy
libdeflate -12
  125984 bytes (123.0k)
local copy
kzip -s0 -rn -b5
  125769 bytes (122.8k)
local copy
Zopfli
  125730 bytes (122.8k)
local copy
Zopfli (defluff)
  125726 bytes (122.8k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.11.0.min.js

You will automatically get the smallest Ember 2.11.0 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 4922 bytes by using my Ember 2.11.0 Zopfli version instead of the best available CDN (3.91% smaller than jsdelivr, 125730 vs. 130652 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 January 24, 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 (125726 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v2.11.0/ember.min.js --location | md5sum
a8636478b8d82d53ff2317cba87e5003  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.11.0.min.zopfli.js.gz | md5sum
a8636478b8d82d53ff2317cba87e5003  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v2.11.0/ember.min.js --location | sha1sum
023a9f03ba6e8d22f780906bfba5677f859d3f36  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.11.0.min.zopfli.js.gz | sha1sum
023a9f03ba6e8d22f780906bfba5677f859d3f36  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 162952 bytes a8636478b8d82d53ff2317cba87e5003 January 29, 2017 @ 13:13
cdnjs 133074 bytes a8636478b8d82d53ff2317cba87e5003 January 24, 2017 @ 09:17
jsdelivr 130652 bytes a8636478b8d82d53ff2317cba87e5003 January 24, 2017 @ 03:33

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
125730 bytes -4 bytes zopfli --i100000 --mls16384 --bsr8 --lazy --ohh January 24, 2017 @ 13:59
125734 bytes -7 bytes zopfli --i10000 --mls16384 --bsr8 --lazy --ohh January 24, 2017 @ 11:22
125741 bytes -5 bytes zopfli --i1000 --mls16384 --bsr8 --lazy --ohh January 24, 2017 @ 11:04
125746 bytes -14 bytes zopfli --i1000 --mls16384 --bsr6 --lazy --ohh January 24, 2017 @ 11:04
125760 bytes -8 bytes zopfli --i1000 --mls4096 --bsr21 --lazy --ohh January 24, 2017 @ 11:04
125768 bytes zopfli --i100 --mls16384 --bsr8 --lazy --ohh January 24, 2017 @ 10:49

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

Most recent activity on January 29, 2017 @ 13:13.

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
125870 125866 125871 125871 125871 125871 125871 125864 125789 125831 125866 125864 125873 125862 125865
125797 125802 125802 125871 125871 125871 125871 125864 125796 125735 125797 125864 125873 125750 125865
125810 125813 125808 125809 125802 125807 125807 125808 125808 125765 125785 125797 125800 125733 125793
125752 125799 125807 125807 125807 125802 125807 125807 125785 125776 125777 125864 125873 125751 125810
125810 125810 125802 125808 125807 125807 125807 125806 125777 125786 125769 125754 125789 125730 125793
125810 125810 125809 125802 125807 125805 125807 125806 125805 125771 125776 125749 125791 125731 125798
125810 125806 125807 125805 125807 125805 125806 125806 125806 125767 125792 125748 125792 125755 125794
125810 125810 125806 125806 125807 125815 125807 125807 125805 125772 125767 125753 125791 125749 125794
125811 125811 125807 125802 125806 125802 125808 125806 125810 125771 125758 125795 125796 125752 125796
125808 125808 125806 125807 125807 125807 125806 125806 125806 125769 125783 125796 125801 125747 125794
125810 125810 125807 125805 125796 125795 125808 125806 125811 125795 125765 125797 125806 125748 125793
125810 125810 125807 125802 125807 125805 125806 125806 125806 125774 125776 125754 125806 125748 125807
125810 125810 125808 125807 125807 125808 125806 125807 125807 125770 125775 125767 125790 125747 125794
125810 125811 125809 125806 125812 125807 125806 125806 125806 125773 125765 125760 125790 125747 125807
125809 125809 125806 125807 125807 125815 125812 125807 125807 125772 125758 125794 125800 125748 125798
125810 125810 125807 125804 125812 125807 125811 125807 125805 125767 125777 125758 125789 125799 125794
125809 125804 125808 125811 125810 125805 125806 125806 125808 125766 125762 125790 125790 125752 125808
125809 125809 125807 125807 125807 125808 125807 125808 125806 125779 125760 125750 125791 125762 125793
125809 125810 125806 125805 125807 125807 125807 125807 125805 125771 125818 125752 125790 125745 125794
125810 125810 125807 125802 125807 125802 125806 125807 125806 125770 125763 125761 125806 125747 125794
125810 125810 125808 125859 125812 125805 125807 125807 125806 125771 125782 125752 125791 125745 125794
125807 125808 125808 125807 125807 125807 125806 125807 125805 125780 125775 125753 125790 125750 125794
125810 125809 125809 125806 125808 125807 125807 125806 125806 125771 125760 125756 125792 125748 125794

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 125768 bytes 100%
1,000 125741 bytes -27 bytes 100%
10,000 125734 bytes -7 bytes 100%
100,000 125730 bytes -4 bytes 1.16%
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
125840 bytes +110 bytes (+0.09%) +71 bytes
125826 bytes +96 bytes (+0.08%) +57 bytes
125892 bytes +162 bytes (+0.13%) +123 bytes
125880 bytes +150 bytes (+0.12%) +111 bytes
125823 bytes +93 bytes (+0.07%) +54 bytes
125769 bytes +39 bytes (+0.03%)
125838 bytes +108 bytes (+0.09%) +69 bytes
125851 bytes +121 bytes (+0.10%) +82 bytes
125889 bytes +159 bytes (+0.13%) +120 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 85092 bytes -40638 bytes (-32.32%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 92062 bytes -33668 bytes (-26.78%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 95716 bytes -30014 bytes (-23.87%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 105592 bytes -20138 bytes (-16.02%)
Brotli (Wikipedia) brotli brotli -q 11 109364 bytes -16366 bytes (-13.02%)
LZMA2 (Wikipedia) xz xz -9 111276 bytes -14454 bytes (-11.50%)
ZSTD (Wikipedia) zstd zstd -19 114717 bytes -11013 bytes (-8.76%)

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