Choose a version:
27% The original file has 1793494 bytes (1,751.5k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 490709 bytes (479.2k, 27%).

After GZIP compression these minified files vary in size:
Boot
  154961 bytes (151.3k)
CDN
cdnjs
  127611 bytes (124.6k)
CDN
gzip -6 (default)
  125813 bytes (122.9k)
local copy
cdnhttps
  125789 bytes (122.8k)
CDN
gzip -9
  125340 bytes (122.4k)
local copy
7zip -mx=9 -tgzip
  121311 bytes (118.5k)
local copy
libdeflate -12
  121154 bytes (118.3k)
local copy
pigz -11 -n
  120959 bytes (118.1k)
local copy
kzip -s0 -rn -b0
  120777 bytes (117.9k)
local copy
Zopfli
  120726 bytes (117.9k)
local copy
Zopfli (defluff)
  120721 bytes (117.9k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-1.13.5.min.js (or via HTTPS)

You will automatically get the smallest Ember 1.13.5 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 5063 bytes by using my Ember 1.13.5 Zopfli version instead of the best available CDN (4.19% smaller than cdnhttps, 120726 vs. 125789 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 --mls64 --bsr7 --lazy --ohh

(found July 21, 2016)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 64  --mls64
block splitting recursion 7  --bsr7
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 5 more bytes (120721 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://builds.emberjs.com/tags/v1.13.5/ember.min.js --location | md5sum
9789a9054c1bfc5c9307b73caf747e45  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-1.13.5.min.zopfli.js.gz | md5sum
9789a9054c1bfc5c9307b73caf747e45  -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v1.13.5/ember.min.js --location | sha1sum
18bd8b92348f142cebd4798c52624eab855f314f  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-1.13.5.min.zopfli.js.gz | sha1sum
18bd8b92348f142cebd4798c52624eab855f314f  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 154961 bytes 9789a9054c1bfc5c9307b73caf747e45 July 21, 2015 @ 19:43
cdnjs 127611 bytes 9789a9054c1bfc5c9307b73caf747e45 July 20, 2015 @ 07:48
cdnhttps 125789 bytes 9789a9054c1bfc5c9307b73caf747e45 December 24, 2015 @ 07:33

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
120726 bytes -6 bytes zopfli --i100000 --mls64 --bsr7 --lazy --ohh July 21, 2016 @ 16:46
120732 bytes -5 bytes zopfli --i10000 --mls64 --bsr7 --lazy --ohh October 13, 2015 @ 22:44
120737 bytes -11 bytes zopfli --i10000 --mls16 --bsr12 --lazy --ohh October 6, 2015 @ 06:19
120748 bytes -1 byte zopfli --i1000 --mls16 --bsr12 --lazy --ohh October 6, 2015 @ 00:52
120749 bytes -1 byte zopfli --i1000 --mls16 --bsr9 --lazy --ohh October 6, 2015 @ 00:40
120750 bytes -2 bytes zopfli --i1000 --mls256 --bsr6 --lazy --ohh October 6, 2015 @ 00:37
120752 bytes -3 bytes zopfli --i1000 --mls4 --bsr15 --lazy --ohh October 6, 2015 @ 00:34
120755 bytes -17 bytes zopfli --i1000 --mls2 --bsr15 --lazy --ohh October 6, 2015 @ 00:32
120772 bytes zopfli --i100 --mls64 --bsr7 --lazy --ohh October 5, 2015 @ 12:00

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

Most recent activity on March 26, 2017 @ 11:06.

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
120900 120901 120903 120901 120902 120901 120899 120900 120900 120902 120904 120933 120943 120939 120940
120797 120792 120800 120791 120792 120878 120782 120791 120786 120777 120916 120933 120943 120939 120776
120764 120766 120756 120757 120782 120742 120881 120740 120750 120781 120788 120796 120943 120939 120910
120797 120790 120793 120795 120875 120726 120743 120754 120746 120791 120765 120781 120780 120773 120789
120790 120881 120885 120793 120881 120879 120879 120882 120879 120876 120766 120766 120789 120889 120811
120744 120741 120761 120737 120877 120876 120876 120877 120876 120876 120876 120765 120795 120890 120885
120756 120740 120740 120739 120876 120876 120880 120878 120879 120878 120877 120877 120888 120890 120883
120787 120784 120771 120793 120876 120863 120875 120874 120881 120876 120877 120880 120888 120890 120884
120804 120746 120761 120737 120875 120876 120876 120873 120881 120876 120873 120882 120884 120895 120885
120800 120788 120793 120768 120884 120876 120876 120877 120881 120876 120876 120877 120876 120886 120887
120765 120765 120761 120758 120875 120876 120876 120876 120877 120877 120876 120877 120888 120886 120885
120742 120736 120762 120799 120875 120876 120876 120878 120877 120877 120877 120877 120883 120890 120885
120794 120790 120795 120781 120876 120876 120876 120876 120874 120877 120877 120884 120887 120889 120883
120791 120782 120791 120767 120876 120876 120875 120873 120877 120877 120877 120884 120882 120889 120888
120740 120745 120739 120786 120876 120876 120876 120873 120887 120881 120876 120874 120884 120890 120879
120744 120745 120767 120740 120878 120876 120876 120874 120876 120881 120877 120874 120887 120891 120890
120785 120878 120878 120787 120876 120876 120877 120873 120874 120879 120876 120878 120884 120889 120884
120790 120793 120882 120787 120883 120876 120876 120876 120879 120877 120881 120877 120882 120890 120882
120801 120879 120778 120794 120875 120876 120877 120880 120884 120877 120877 120881 120888 120894 120887
120804 120741 120793 120784 120876 120876 120876 120876 120881 120877 120876 120880 120888 120886 120884
120790 120796 120793 120787 120875 120876 120876 120880 120881 120877 120877 120877 120882 120886 120881
120792 120799 120791 120777 120875 120876 120877 120877 120876 120882 120876 120878 120884 120889 120888
120805 120796 120793 120779 120876 120876 120878 120881 120884 120877 120876 120877 120884 120890 120887

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 120772 bytes 100%
1,000 120748 bytes -24 bytes 100%
10,000 120732 bytes -16 bytes 100%
100,000 120726 bytes -6 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
120777 bytes +51 bytes (+0.04%)
120909 bytes +183 bytes (+0.15%) +132 bytes
120924 bytes +198 bytes (+0.16%) +147 bytes
120875 bytes +149 bytes (+0.12%) +98 bytes
120799 bytes +73 bytes (+0.06%) +22 bytes
120780 bytes +54 bytes (+0.04%) +3 bytes
120827 bytes +101 bytes (+0.08%) +50 bytes
120867 bytes +141 bytes (+0.12%) +90 bytes
120938 bytes +212 bytes (+0.18%) +161 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 82213 bytes -38513 bytes (-31.90%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 88457 bytes -32269 bytes (-26.73%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 95605 bytes -25121 bytes (-20.81%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 100466 bytes -20260 bytes (-16.78%)
Brotli (Wikipedia) brotli brotli -q 11 105017 bytes -15709 bytes (-13.01%)
LZMA2 (Wikipedia) xz xz -9 107200 bytes -13526 bytes (-11.20%)
Zstandard (Wikipedia) zstd zstd -19 110231 bytes -10495 bytes (-8.69%)

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