Choose a version:
29% The original file has 1735818 bytes (1,695.1k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 501146 bytes (489.4k, 29%).

After GZIP compression these minified files vary in size:
Boot
  160085 bytes (156.3k)
CDN, direct link
cdnjs
  131718 bytes (128.6k)
CDN, direct link
gzip -6 (default)
  130012 bytes (127.0k)
local copy
gzip -9
  129511 bytes (126.5k)
local copy
7zip -mx=9 -tgzip
  124947 bytes (122.0k)
local copy
libdeflate -12
  124853 bytes (121.9k)
local copy
pigz -11 -n
  124804 bytes (121.9k)
local copy
kzip -s0 -rn -b2
  124690 bytes (121.8k)
local copy
Zopfli
  124622 bytes (121.7k)
local copy
Zopfli (defluff)
  124620 bytes (121.7k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.13.3.min.js

You will automatically get the smallest Ember 2.13.3 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 7096 bytes by using my Ember 2.13.3 Zopfli version instead of the best available CDN (5.69% smaller than cdnjs, 124622 vs. 131718 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 --i1000000 --mb8 --mls16 --bsr14 --lazy --ohh

(found June 6, 2017)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 16  --mls16
block splitting recursion 14  --bsr14
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 2 more bytes (124620 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v2.13.3/ember.min.js --location | md5sum
f072a1057a9e336ec8dc6714ceb1c65c  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.13.3.min.zopfli.js.gz | md5sum
f072a1057a9e336ec8dc6714ceb1c65c  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v2.13.3/ember.min.js --location | sha1sum
f7c5da5eb4aa9f1101cb0679fd7bf7bf13b263cf  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.13.3.min.zopfli.js.gz | sha1sum
f7c5da5eb4aa9f1101cb0679fd7bf7bf13b263cf  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 160085 bytes f072a1057a9e336ec8dc6714ceb1c65c June 1, 2017 @ 10:36
cdnjs 131718 bytes f072a1057a9e336ec8dc6714ceb1c65c June 1, 2017 @ 00:18

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

Other Versions

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

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
124622 bytes -2 bytes zopfli --i1000000 --mls16 --bsr14 --lazy --ohh June 6, 2017 @ 11:40
124624 bytes -5 bytes zopfli --i100000 --mls16 --bsr14 --lazy --ohh June 2, 2017 @ 22:03
124629 bytes -7 bytes zopfli --i100000 --mls1024 --bsr25 --lazy --ohh June 2, 2017 @ 19:22
124636 bytes -13 bytes zopfli --i10000 --mls1024 --bsr25 --lazy --ohh June 2, 2017 @ 16:47
124649 bytes -1 byte zopfli --i1000 --mls1024 --bsr25 --lazy --ohh June 2, 2017 @ 15:38
124650 bytes -3 bytes zopfli --i1000 --mls16 --bsr14 --lazy --ohh June 2, 2017 @ 15:35
124653 bytes -6 bytes zopfli --i1000 --mls4 --bsr14 --lazy --ohh June 2, 2017 @ 15:35
124659 bytes -16 bytes zopfli --i1000 --mls8 --bsr9 --lazy --ohh June 2, 2017 @ 15:35
124675 bytes zopfli --i100 --mls1024 --bsr25 --lazy --ohh June 2, 2017 @ 13:35

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

Most recent activity on June 8, 2017 @ 10:22.

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
124661 124670 124665 124663 124652 124655 124639 124668 124653 124652 124660 124645 124668 124650 124661
124653 124652 124650 124649 124643 124649 124652 124651 124643 124659 124643 124649 124654 124652 124666
124646 124657 124649 124653 124641 124654 124648 124654 124642 124658 124643 124652 124654 124655 124661
124651 124656 124652 124654 124652 124654 124657 124657 124641 124645 124643 124644 124664 124648 124651
124645 124655 124643 124651 124637 124652 124647 124643 124647 124651 124651 124644 124664 124646 124650
124641 124645 124646 124642 124651 124652 124658 124647 124639 124637 124655 124644 124647 124653 124642
124651 124646 124640 124646 124653 124641 124652 124647 124647 124648 124640 124649 124663 124663 124642
124642 124655 124652 124644 124649 124643 124647 124643 124639 124638 124639 124646 124653 124662 124641
124645 124653 124650 124653 124664 124643 124644 124648 124654 124648 124640 124648 124649 124653 124664
124642 124647 124649 124643 124646 124647 124649 124645 124641 124647 124646 124646 124648 124653 124654
124637 124639 124651 124622 124648 124650 124638 124648 124649 124644 124641 124652 124645 124662 124667
124648 124647 124642 124654 124648 124647 124649 124648 124645 124645 124649 124648 124645 124669 124650
124641 124652 124648 124647 124648 124649 124649 124648 124660 124654 124648 124649 124659 124662 124657
124646 124648 124645 124642 124649 124643 124649 124648 124640 124649 124648 124646 124659 124666 124654
124646 124646 124647 124645 124651 124650 124644 124650 124645 124675 124632 124647 124665 124664 124652
124647 124645 124644 124647 124648 124643 124647 124648 124647 124642 124647 124647 124656 124658 124652
124649 124648 124645 124651 124647 124647 124648 124648 124647 124648 124641 124644 124656 124657 124671
124638 124647 124652 124654 124648 124645 124649 124647 124641 124645 124646 124631 124658 124663 124649
124651 124648 124640 124644 124660 124643 124650 124646 124647 124645 124645 124647 124658 124651 124652
124648 124654 124651 124656 124645 124649 124645 124648 124642 124649 124649 124648 124652 124664 124674
124648 124646 124649 124641 124646 124644 124645 124648 124648 124629 124635 124652 124645 124661 124674
124638 124642 124641 124643 124649 124648 124644 124646 124647 124648 124645 124646 124659 124657 124650
124661 124666 124651 124644 124647 124643 124651 124649 124641 124645 124646 124652 124654 124659 124650

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 124675 bytes 100%
1,000 124649 bytes -26 bytes 100%
10,000 124633 bytes -16 bytes 100%
100,000 124624 bytes -9 bytes 1.16%
1,000,000 124622 bytes -2 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
124695 bytes +73 bytes (+0.06%) +5 bytes
124709 bytes +87 bytes (+0.07%) +19 bytes
124690 bytes +68 bytes (+0.05%)
124709 bytes +87 bytes (+0.07%) +19 bytes
124744 bytes +122 bytes (+0.10%) +54 bytes
124791 bytes +169 bytes (+0.14%) +101 bytes
124827 bytes +205 bytes (+0.16%) +137 bytes
124848 bytes +226 bytes (+0.18%) +158 bytes
124844 bytes +222 bytes (+0.18%) +154 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 85430 bytes -39192 bytes (-31.45%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 92434 bytes -32188 bytes (-25.83%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 99877 bytes -24745 bytes (-19.86%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 106054 bytes -18568 bytes (-14.90%)
Brotli (Wikipedia) brotli brotli -q 11 108567 bytes -16055 bytes (-12.88%)
LZMA2 (Wikipedia) xz xz -9 110436 bytes -14186 bytes (-11.38%)
ZSTD (Wikipedia) zstd zstd -19 113609 bytes -11013 bytes (-8.84%)

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