Choose a version:
27% The original file has 1724277 bytes (1,683.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 459845 bytes (449.1k, 27%).

After GZIP compression these minified files vary in size:
Boot
  145066 bytes (141.7k)
CDN
cdnjs
  119086 bytes (116.3k)
CDN
gzip -6 (default)
  117253 bytes (114.5k)
local copy
gzip -9
  116846 bytes (114.1k)
local copy
cdnhttps
  116744 bytes (114.0k)
CDN
libdeflate -12
  113063 bytes (110.4k)
local copy
7zip -mx=9 -tgzip
  113060 bytes (110.4k)
local copy
pigz -11 -n
  112776 bytes (110.1k)
local copy
kzip -s0 -rn -b5
  112676 bytes (110.0k)
local copy
Zopfli
  112598 bytes (110.0k)
local copy
Zopfli (defluff)
  112592 bytes (110.0k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.4.6.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.4.6 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 4146 bytes by using my Ember 2.4.6 Zopfli version instead of the best available CDN (3.68% smaller than cdnhttps, 112598 vs. 116744 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 --mls8192 --bsr15 --lazy --ohh

(found September 20, 2016)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 8192  --mls8192
block splitting recursion 15  --bsr15
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 6 more bytes (112592 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://builds.emberjs.com/tags/v2.4.6/ember.min.js --location | md5sum
83fc75cb8bad94eca451c4b9b0eb50f5  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.4.6.min.zopfli.js.gz | md5sum
83fc75cb8bad94eca451c4b9b0eb50f5  -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.4.6/ember.min.js --location | sha1sum
091e2cab6ecd0387b92e2020f7fcd0057b1afd25  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.4.6.min.zopfli.js.gz | sha1sum
091e2cab6ecd0387b92e2020f7fcd0057b1afd25  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 145066 bytes 83fc75cb8bad94eca451c4b9b0eb50f5 June 6, 2016 @ 06:42
cdnjs 119086 bytes 83fc75cb8bad94eca451c4b9b0eb50f5 June 22, 2016 @ 22:03
cdnhttps 116744 bytes 83fc75cb8bad94eca451c4b9b0eb50f5 November 22, 2016 @ 16:33

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
112598 bytes -3 bytes zopfli --i1000000 --mls8192 --bsr15 --lazy --ohh September 20, 2016 @ 06:59
112601 bytes -3 bytes zopfli --i100000 --mls8192 --bsr15 --lazy --ohh September 17, 2016 @ 02:44
112604 bytes -3 bytes zopfli --i100000 --mls8192 --bsr16 --lazy --ohh September 15, 2016 @ 14:29
112607 bytes -11 bytes zopfli --i10000 --mls8192 --bsr16 --lazy --ohh September 15, 2016 @ 11:14
112618 bytes -3 bytes zopfli --i1000 --mls4096 --bsr17 --lazy --ohh September 15, 2016 @ 10:59
112621 bytes -20 bytes zopfli --i1000 --mls8192 --bsr16 --lazy --ohh September 15, 2016 @ 10:51
112641 bytes zopfli --i100 --mls8192 --bsr16 --lazy --ohh September 15, 2016 @ 10:33

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

Most recent activity on November 22, 2016 @ 16:33.

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
112720 112720 112720 112727 112718 112730 112726 112733 112731 112725 112731 112727 112727 112726 112729
112638 112635 112632 112631 112641 112642 112644 112670 112663 112672 112640 112726 112724 112645 112717
112623 112627 112626 112626 112651 112664 112654 112654 112734 112728 112649 112624 112645 112632 112725
112723 112725 112717 112723 112612 112722 112722 112722 112726 112730 112656 112619 112613 112629 112716
112717 112718 112726 112717 112721 112723 112621 112723 112720 112728 112641 112610 112625 112627 112718
112723 112725 112793 112723 112722 112722 112722 112722 112726 112723 112796 112730 112617 112716 112716
112723 112719 112793 112723 112721 112721 112722 112722 112726 112723 112627 112727 112614 112722 112714
112723 112725 112730 112727 112722 112726 112722 112722 112723 112723 112723 112612 112648 112716 112716
112726 112725 112726 112726 112721 112722 112722 112726 112722 112723 112634 112616 112626 112715 112717
112724 112724 112726 112722 112721 112722 112722 112722 112726 112789 112649 112610 112625 112722 112724
112632 112727 112726 112718 112723 112721 112723 112722 112722 112723 112648 112618 112625 112715 112716
112719 112719 112722 112718 112616 112722 112722 112722 112726 112729 112652 112616 112598 112722 112716
112727 112725 112723 112725 112721 112730 112728 112729 112723 112717 112648 112619 112604 112715 112718
112723 112725 112726 112727 112721 112722 112722 112722 112723 112723 112647 112613 112615 112715 112714
112629 112795 112717 112717 112610 112722 112612 112722 112723 112789 112649 112617 112605 112722 112716
112619 112724 112724 112723 112721 112721 112720 112719 112718 112723 112654 112613 112606 112715 112716
112729 112728 112724 112769 112721 112728 112726 112722 112726 112721 112630 112611 112633 112715 112716
112729 112722 112723 112721 112721 112722 112722 112722 112726 112723 112645 112615 112633 112716 112716
112722 112725 112723 112725 112612 112787 112611 112723 112722 112723 112644 112616 112605 112715 112716
112723 112725 112793 112717 112612 112723 112613 112722 112722 112723 112632 112612 112625 112720 112716
112607 112717 112793 112723 112612 112722 112722 112722 112722 112722 112633 112606 112618 112715 112717
112722 112725 112723 112718 112721 112722 112722 112723 112722 112723 112646 112612 112626 112715 112716
112723 112725 112721 112727 112723 112723 112722 112722 112722 112723 112639 112616 112605 112722 112716

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 112641 bytes 100%
1,000 112615 bytes -26 bytes 100%
10,000 112607 bytes -8 bytes 100%
100,000 112601 bytes -6 bytes 2.32%
1,000,000 112598 bytes -3 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
112787 bytes +189 bytes (+0.17%) +111 bytes
112735 bytes +137 bytes (+0.12%) +59 bytes
112791 bytes +193 bytes (+0.17%) +115 bytes
112816 bytes +218 bytes (+0.19%) +140 bytes
112717 bytes +119 bytes (+0.11%) +41 bytes
112676 bytes +78 bytes (+0.07%)
112723 bytes +125 bytes (+0.11%) +47 bytes
112780 bytes +182 bytes (+0.16%) +104 bytes
112813 bytes +215 bytes (+0.19%) +137 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 76770 bytes -35828 bytes (-31.82%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 82223 bytes -30375 bytes (-26.98%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 88593 bytes -24005 bytes (-21.32%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 93536 bytes -19062 bytes (-16.93%)
Brotli (Wikipedia) brotli brotli -q 11 97773 bytes -14825 bytes (-13.17%)
LZMA2 (Wikipedia) xz xz -9 100008 bytes -12590 bytes (-11.18%)
Zstandard (Wikipedia) zstd zstd -19 102794 bytes -9804 bytes (-8.71%)

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