Choose a version:
29% The original file has 1736268 bytes (1,695.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 501251 bytes (489.5k, 29%).

After GZIP compression these minified files vary in size:
Boot
  160109 bytes (156.4k)
CDN
cdnjs
  131772 bytes (128.7k)
CDN
gzip -6 (default)
  130054 bytes (127.0k)
local copy
gzip -9
  129555 bytes (126.5k)
local copy
7zip -mx=9 -tgzip
  125001 bytes (122.1k)
local copy
libdeflate -12
  124903 bytes (122.0k)
local copy
pigz -11 -n
  124871 bytes (121.9k)
local copy
kzip -s0 -rn -b0
  124738 bytes (121.8k)
local copy
Zopfli
  124682 bytes (121.8k)
local copy
Zopfli (defluff)
  124680 bytes (121.8k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.13.2.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.13.2 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 7090 bytes by using my Ember 2.13.2 Zopfli version instead of the best available CDN (5.69% smaller than cdnjs, 124682 vs. 131772 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 --mls4 --bsr14 --lazy --ohh

(found May 23, 2017)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 4  --mls4
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 (124680 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://builds.emberjs.com/tags/v2.13.2/ember.min.js --location | md5sum
d1264f4487a822515695e7e0b1f08ae6  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.13.2.min.zopfli.js.gz | md5sum
d1264f4487a822515695e7e0b1f08ae6  -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.13.2/ember.min.js --location | sha1sum
22908252e8fe8f1fce20306eb03077de698efeaf  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.13.2.min.zopfli.js.gz | sha1sum
22908252e8fe8f1fce20306eb03077de698efeaf  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 160109 bytes d1264f4487a822515695e7e0b1f08ae6 May 22, 2017 @ 08:01
cdnjs 131772 bytes d1264f4487a822515695e7e0b1f08ae6 May 18, 2017 @ 18:18

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
124682 bytes -1 byte zopfli --i1000000 --mls4 --bsr14 --lazy --ohh May 23, 2017 @ 05:51
124683 bytes -1 byte zopfli --i100000 --mls4 --bsr14 --lazy --ohh May 22, 2017 @ 12:36
124684 bytes -4 bytes zopfli --i100000 --mls8 --bsr20 --lazy --ohh May 22, 2017 @ 12:28
124688 bytes -4 bytes zopfli --i10000 --mls4 --bsr14 --lazy --ohh May 19, 2017 @ 20:44
124692 bytes -9 bytes zopfli --i10000 --mls1024 --bsr19 --lazy --ohh May 19, 2017 @ 19:22
124701 bytes -3 bytes zopfli --i1000 --mls1024 --bsr19 --lazy --ohh May 19, 2017 @ 16:53
124704 bytes -2 bytes zopfli --i1000 --mls128 --bsr18 --lazy --ohh May 19, 2017 @ 16:52
124706 bytes -20 bytes zopfli --i1000 --mls4 --bsr14 --lazy --ohh May 19, 2017 @ 16:51
124726 bytes zopfli --i100 --mls128 --bsr10 --lazy --ohh May 19, 2017 @ 16:40

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

Most recent activity on May 23, 2017 @ 10:19.

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
124721 124723 124696 124705 124707 124697 124702 124715 124696 124704 124702 124713 124703 124705 124708
124704 124709 124708 124701 124698 124695 124699 124695 124693 124713 124697 124693 124700 124705 124720
124705 124694 124705 124695 124696 124704 124705 124710 124702 124707 124705 124695 124711 124697 124706
124705 124705 124705 124701 124704 124709 124707 124707 124693 124684 124706 124707 124703 124705 124704
124704 124705 124699 124703 124705 124699 124708 124714 124706 124697 124695 124706 124697 124700 124712
124702 124704 124701 124701 124708 124696 124700 124707 124693 124698 124698 124700 124703 124708 124694
124705 124705 124694 124705 124704 124705 124693 124695 124698 124700 124692 124699 124695 124705 124696
124697 124696 124705 124700 124711 124706 124694 124705 124700 124701 124702 124709 124707 124695 124696
124694 124704 124709 124704 124706 124722 124702 124700 124694 124700 124704 124715 124705 124695 124715
124697 124700 124701 124694 124696 124700 124703 124703 124700 124699 124699 124698 124699 124706 124706
124694 124682 124695 124697 124686 124702 124696 124704 124700 124698 124700 124707 124707 124707 124711
124697 124704 124704 124701 124700 124686 124702 124702 124701 124700 124700 124702 124707 124715 124713
124700 124698 124700 124699 124692 124701 124699 124699 124704 124704 124701 124699 124712 124704 124709
124691 124705 124708 124698 124693 124700 124694 124699 124700 124699 124685 124698 124710 124699 124714
124700 124697 124720 124696 124705 124703 124695 124703 124699 124699 124703 124722 124716 124707 124705
124692 124699 124706 124702 124701 124700 124698 124702 124700 124692 124699 124699 124711 124704 124704
124707 124700 124684 124702 124700 124700 124699 124701 124699 124700 124699 124703 124697 124716 124704
124709 124701 124699 124713 124697 124700 124701 124697 124699 124701 124699 124699 124708 124706 124713
124707 124700 124694 124694 124711 124699 124701 124702 124699 124700 124699 124700 124710 124699 124700
124699 124699 124704 124711 124712 124700 124702 124702 124700 124701 124701 124699 124705 124715 124717
124698 124702 124704 124701 124698 124700 124702 124702 124701 124700 124699 124705 124708 124712 124713
124691 124701 124696 124698 124696 124700 124701 124700 124692 124700 124699 124692 124712 124711 124712
124709 124711 124705 124707 124700 124701 124702 124701 124700 124699 124698 124695 124706 124712 124707

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 124726 bytes 100%
1,000 124701 bytes -25 bytes 100%
10,000 124688 bytes -13 bytes 100%
100,000 124683 bytes -5 bytes 1.74%
1,000,000 124682 bytes -1 byte 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
124738 bytes +56 bytes (+0.04%)
124749 bytes +67 bytes (+0.05%) +11 bytes
124744 bytes +62 bytes (+0.05%) +6 bytes
124761 bytes +79 bytes (+0.06%) +23 bytes
124789 bytes +107 bytes (+0.09%) +51 bytes
124854 bytes +172 bytes (+0.14%) +116 bytes
124887 bytes +205 bytes (+0.16%) +149 bytes
124901 bytes +219 bytes (+0.18%) +163 bytes
124905 bytes +223 bytes (+0.18%) +167 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 85449 bytes -39233 bytes (-31.47%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 92452 bytes -32230 bytes (-25.85%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 99909 bytes -24773 bytes (-19.87%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 106151 bytes -18531 bytes (-14.86%)
Brotli (Wikipedia) brotli brotli -q 11 108592 bytes -16090 bytes (-12.90%)
LZMA2 (Wikipedia) xz xz -9 110456 bytes -14226 bytes (-11.41%)
Zstandard (Wikipedia) zstd zstd -19 113616 bytes -11066 bytes (-8.88%)

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