Choose a version:
30% The original file has 1605817 bytes (1,568.2k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 488069 bytes (476.6k, 30%).

After GZIP compression these minified files vary in size:
Boot
  150772 bytes (147.2k)
CDN
cdnjs
  124021 bytes (121.1k)
CDN
gzip -6 (default)
  122503 bytes (119.6k)
local copy
gzip -9
  121984 bytes (119.1k)
local copy
7zip -mx=9 -tgzip
  117837 bytes (115.1k)
local copy
libdeflate -12
  117762 bytes (115.0k)
local copy
pigz -11 -n
  117691 bytes (114.9k)
local copy
kzip -s0 -rn -b3
  117554 bytes (114.8k)
local copy
Zopfli
  117537 bytes (114.8k)
local copy
Zopfli (defluff)
  117533 bytes (114.8k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.17.0.min.js

You will automatically get the smallest Ember 2.17.0 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 6484 bytes by using my Ember 2.17.0 Zopfli version instead of the best available CDN (5.52% smaller than cdnjs, 117537 vs. 124021 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 --mls2 --bsr12 --lazy --ohh

(found December 2, 2017)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 2  --mls2
block splitting recursion 12  --bsr12
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 (117533 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v2.17.0/ember.min.js --location | md5sum
d2efac2ea6a4740849bb9f6452e3c1d7  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.17.0.min.zopfli.js.gz | md5sum
d2efac2ea6a4740849bb9f6452e3c1d7  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v2.17.0/ember.min.js --location | sha1sum
5ef3484c8a12293358771ce065a3776168b9854b  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-2.17.0.min.zopfli.js.gz | sha1sum
5ef3484c8a12293358771ce065a3776168b9854b  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 150772 bytes d2efac2ea6a4740849bb9f6452e3c1d7 December 5, 2017 @ 09:33
cdnjs 124021 bytes d2efac2ea6a4740849bb9f6452e3c1d7 November 29, 2017 @ 17:33

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

Other Versions

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

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
117537 bytes -1 byte zopfli --i1000000 --mls2 --bsr12 --lazy --ohh December 2, 2017 @ 02:36
117538 bytes -2 bytes zopfli --i100000 --mls2 --bsr12 --lazy --ohh December 1, 2017 @ 02:07
117540 bytes -2 bytes zopfli --i100000 --mls16 --bsr8 --lazy --ohh November 30, 2017 @ 21:03
117542 bytes -1 byte zopfli --i10000 --mls8 --bsr12 --lazy --ohh November 30, 2017 @ 18:53
117543 bytes -1 byte zopfli --i10000 --mls16 --bsr8 --lazy --ohh November 30, 2017 @ 18:15
117544 bytes -6 bytes zopfli --i10000 --mls16 --bsr12 --lazy --ohh November 30, 2017 @ 17:32
117550 bytes -1 byte zopfli --i1000 --mls16 --bsr12 --lazy --ohh November 30, 2017 @ 16:38
117551 bytes -1 byte zopfli --i1000 --mls16 --bsr9 --lazy --ohh November 30, 2017 @ 16:27
117552 bytes -2 bytes zopfli --i1000 --mls4096 --bsr30 --lazy --ohh November 30, 2017 @ 16:24
117554 bytes -16 bytes zopfli --i1000 --mls8 --bsr21 --lazy --ohh November 30, 2017 @ 16:24
117570 bytes zopfli --i100 --mls8 --bsr4 --lazy --ohh November 30, 2017 @ 16:11

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

Most recent activity on December 5, 2017 @ 09:33.

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
117571 117572 117565 117567 117561 117567 117569 117567 117569 117562 117560 117565 117558 117564 117612
117562 117564 117545 117560 117543 117564 117560 117564 117621 117567 117550 117556 117576 117561 117614
117559 117574 117565 117546 117546 117549 117556 117561 117556 117556 117550 117546 117554 117567 117609
117556 117556 117559 117544 117546 117545 117554 117556 117564 117558 117546 117551 117558 117551 117614
117556 117556 117562 117540 117550 117549 117557 117572 117563 117566 117543 117547 117573 117568 117607
117561 117557 117557 117545 117544 117549 117559 117564 117563 117561 117545 117544 117572 117569 117576
117559 117563 117564 117558 117545 117548 117560 117570 117546 117544 117552 117559 117576 117576 117571
117562 117562 117544 117544 117547 117544 117557 117560 117555 117547 117564 117546 117571 117570 117560
117537 117543 117540 117544 117540 117548 117555 117561 117557 117559 117544 117546 117612 117572 117617
117547 117544 117559 117545 117543 117543 117553 117560 117558 117556 117567 117567 117612 117573 117569
117576 117575 117560 117552 117550 117549 117554 117563 117552 117545 117561 117562 117581 117569 117570
117544 117543 117545 117545 117543 117545 117546 117559 117545 117548 117550 117553 117612 117572 117607
117561 117543 117543 117545 117544 117547 117545 117559 117546 117543 117544 117558 117571 117564 117571
117543 117544 117544 117548 117557 117550 117555 117560 117548 117546 117541 117548 117570 117566 117567
117562 117559 117559 117545 117540 117552 117559 117559 117552 117559 117543 117552 117571 117571 117608
117561 117561 117560 117547 117544 117545 117547 117563 117546 117546 117559 117543 117569 117574 117607
117560 117563 117545 117545 117544 117544 117553 117560 117552 117559 117557 117545 117572 117574 117611
117562 117546 117545 117546 117545 117545 117548 117559 117548 117549 117543 117545 117571 117569 117618
117559 117558 117560 117545 117560 117545 117556 117558 117545 117544 117544 117546 117570 117573 117608
117563 117561 117553 117545 117549 117550 117561 117560 117557 117558 117543 117547 117573 117567 117573
117547 117547 117544 117545 117547 117545 117545 117548 117547 117548 117543 117547 117569 117573 117569
117548 117547 117543 117544 117544 117544 117554 117559 117547 117559 117547 117545 117571 117557 117607
117562 117561 117543 117545 117544 117546 117545 117547 117545 117545 117544 117543 117572 117574 117611

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 117570 bytes 100%
1,000 117550 bytes -20 bytes 100%
10,000 117542 bytes -8 bytes 100%
100,000 117538 bytes -4 bytes 1.74%
1,000,000 117537 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
117617 bytes +80 bytes (+0.07%) +63 bytes
117639 bytes +102 bytes (+0.09%) +85 bytes
117600 bytes +63 bytes (+0.05%) +46 bytes
117554 bytes +17 bytes (+0.01%)
117611 bytes +74 bytes (+0.06%) +57 bytes
117646 bytes +109 bytes (+0.09%) +92 bytes
117631 bytes +94 bytes (+0.08%) +77 bytes
117591 bytes +54 bytes (+0.05%) +37 bytes
117631 bytes +94 bytes (+0.08%) +77 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 81083 bytes -36454 bytes (-31.01%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 87899 bytes -29638 bytes (-25.22%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 94445 bytes -23092 bytes (-19.65%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 100711 bytes -16826 bytes (-14.32%)
Brotli (Wikipedia) brotli brotli -q 11 102634 bytes -14903 bytes (-12.68%)
LZMA2 (Wikipedia) xz xz -9 104124 bytes -13413 bytes (-11.41%)
ZSTD (Wikipedia) zstd zstd -19 107141 bytes -10396 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