Choose a version:
28% The original file has 1443480 bytes (1,409.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 408318 bytes (398.7k, 28%).

After GZIP compression these minified files vary in size:
Boot
  131539 bytes (128.5k)
CDN
cdnjs
  108050 bytes (105.5k)
CDN
gzip -6 (default)
  106655 bytes (104.2k)
local copy
cdnhttps
  106515 bytes (104.0k)
CDN
gzip -9
  106345 bytes (103.9k)
local copy
7zip -mx=9 -tgzip
  102760 bytes (100.4k)
local copy
libdeflate -12
  102636 bytes (100.2k)
local copy
pigz -11 -n
  102527 bytes (100.1k)
local copy
kzip -s0 -rn -b1
  102352 bytes (100.0k)
local copy
Zopfli
  102322 bytes (99.9k)
local copy
Zopfli (defluff)
  102319 bytes (99.9k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-1.11.1.min.js

You will automatically get the smallest Ember 1.11.1 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 4193 bytes by using my Ember 1.11.1 Zopfli version instead of the best available CDN (4.10% smaller than cdnhttps, 102322 vs. 106515 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 --mls256 --bsr22 --lazy --ohh

(found July 22, 2016)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 256  --mls256
block splitting recursion 22  --bsr22
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 3 more bytes (102319 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v1.11.1/ember.min.js --location | md5sum
943947661a78a0d8f332405a63d2494d  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.11.1.min.zopfli.js.gz | md5sum
943947661a78a0d8f332405a63d2494d  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v1.11.1/ember.min.js --location | sha1sum
5b8de5ca87b3a7d1dd16e6a676a96c759eeaa10b  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.11.1.min.zopfli.js.gz | sha1sum
5b8de5ca87b3a7d1dd16e6a676a96c759eeaa10b  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 131539 bytes 943947661a78a0d8f332405a63d2494d April 6, 2015 @ 23:33
cdnjs 108050 bytes 943947661a78a0d8f332405a63d2494d April 4, 2015 @ 07:30
cdnhttps 106515 bytes 943947661a78a0d8f332405a63d2494d 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
102322 bytes -4 bytes zopfli --i100000 --mls256 --bsr22 --lazy --ohh July 22, 2016 @ 20:24
102326 bytes -9 bytes zopfli --i10000 --mls16 --bsr30 --lazy --ohh October 1, 2015 @ 10:19
102335 bytes -1 byte zopfli --i1000 --mls256 --bsr22 --lazy --ohh September 30, 2015 @ 20:53
102336 bytes -5 bytes zopfli --i1000 --mls8192 --bsr17 --lazy --ohh September 30, 2015 @ 19:58
102341 bytes -8 bytes zopfli --i1000 --mls32768 --bsr7 --lazy --ohh September 30, 2015 @ 19:37
102349 bytes -7 bytes zopfli --i1000 --mls32768 --bsr4 --lazy --ohh September 30, 2015 @ 19:34
102356 bytes zopfli --i100 --mls32768 --bsr4 --lazy --ohh September 30, 2015 @ 09:16

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

Most recent activity on March 28, 2017 @ 18:53.

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
102365 102326 102329 102364 102364 102365 102397 102397 102365 102364 102372 102372 102364 102395 102374
102327 102326 102330 102326 102331 102330 102328 102327 102327 102331 102328 102329 102334 102341 102332
102368 102366 102329 102364 102367 102367 102397 102397 102359 102359 102358 102361 102367 102364 102367
102327 102331 102328 102330 102329 102327 102327 102328 102327 102327 102327 102358 102366 102339 102328
102326 102326 102327 102327 102327 102328 102328 102328 102326 102327 102327 102326 102333 102338 102333
102332 102329 102329 102330 102331 102327 102327 102328 102327 102327 102327 102329 102333 102343 102334
102328 102326 102329 102331 102328 102327 102328 102328 102327 102328 102328 102327 102328 102341 102333
102329 102328 102328 102324 102327 102328 102328 102327 102331 102329 102328 102327 102334 102338 102334
102327 102332 102327 102326 102327 102327 102327 102328 102327 102327 102327 102329 102333 102338 102333
102324 102328 102330 102327 102327 102327 102328 102328 102326 102327 102328 102329 102328 102341 102332
102328 102326 102330 102326 102327 102327 102327 102328 102327 102327 102327 102329 102334 102341 102333
102337 102333 102328 102329 102328 102327 102327 102328 102327 102327 102327 102328 102333 102343 102334
102332 102327 102326 102328 102329 102328 102328 102327 102327 102327 102327 102327 102334 102338 102334
102328 102327 102329 102330 102329 102329 102327 102326 102331 102327 102327 102327 102327 102341 102334
102330 102328 102330 102330 102327 102328 102328 102327 102327 102327 102327 102326 102328 102341 102333
102333 102329 102330 102324 102327 102328 102328 102327 102326 102327 102327 102329 102329 102337 102333
102328 102328 102327 102326 102327 102327 102328 102326 102327 102327 102327 102327 102328 102342 102334
102324 102326 102327 102326 102327 102327 102327 102328 102327 102327 102327 102326 102328 102342 102334
102328 102326 102326 102325 102327 102327 102328 102322 102327 102327 102328 102327 102333 102339 102333
102328 102326 102327 102327 102328 102327 102328 102328 102325 102327 102327 102327 102328 102339 102328
102327 102326 102327 102326 102327 102327 102328 102328 102325 102327 102327 102327 102335 102342 102333
102326 102326 102327 102326 102326 102328 102327 102328 102327 102327 102327 102328 102328 102337 102334
102324 102330 102330 102337 102328 102328 102327 102327 102326 102327 102328 102326 102335 102341 102333

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 102356 bytes 100%
1,000 102335 bytes -21 bytes 100%
10,000 102324 bytes -11 bytes 100%
100,000 102322 bytes -2 bytes 3.19%
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
102359 bytes +37 bytes (+0.04%) +7 bytes
102352 bytes +30 bytes (+0.03%)
102396 bytes +74 bytes (+0.07%) +44 bytes
102435 bytes +113 bytes (+0.11%) +83 bytes
102482 bytes +160 bytes (+0.16%) +130 bytes
102493 bytes +171 bytes (+0.17%) +141 bytes
102525 bytes +203 bytes (+0.20%) +173 bytes
102498 bytes +176 bytes (+0.17%) +146 bytes
102490 bytes +168 bytes (+0.16%) +138 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 70745 bytes -31577 bytes (-30.86%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 75311 bytes -27011 bytes (-26.40%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 79882 bytes -22440 bytes (-21.93%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 85670 bytes -16652 bytes (-16.27%)
Brotli (Wikipedia) brotli brotli -q 11 89704 bytes -12618 bytes (-12.33%)
LZMA2 (Wikipedia) xz xz -9 91544 bytes -10778 bytes (-10.53%)
ZSTD (Wikipedia) zstd zstd -19 94117 bytes -8205 bytes (-8.02%)

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