Choose a version:
28% The original file has 1444846 bytes (1,411.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 409162 bytes (399.6k, 28%).

After GZIP compression these minified files vary in size:
Boot
  131497 bytes (128.4k)
CDN
cdnjs
  108069 bytes (105.5k)
CDN
gzip -6 (default)
  106653 bytes (104.2k)
local copy
cdnhttps
  106512 bytes (104.0k)
CDN
gzip -9
  106343 bytes (103.9k)
local copy
7zip -mx=9 -tgzip
  102776 bytes (100.4k)
local copy
libdeflate -12
  102595 bytes (100.2k)
local copy
pigz -11 -n
  102538 bytes (100.1k)
local copy
kzip -s0 -rn -b0
  102358 bytes (100.0k)
local copy
Zopfli
  102329 bytes (99.9k)
local copy
Zopfli (defluff)
  102328 bytes (99.9k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-1.11.3.min.js (or via HTTPS)

You will automatically get the smallest Ember 1.11.3 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 4183 bytes by using my Ember 1.11.3 Zopfli version instead of the best available CDN (4.09% smaller than cdnhttps, 102329 vs. 106512 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 --i10000 --mb8 --mls32 --bsr11 --lazy --ohh

(found March 21, 2017)
Description Value Parameter
iterations 10000  --i10000
maximum blocks 8  --mb8
maximum length score 32  --mls32
block splitting recursion 11  --bsr11
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 1 more byte (102328 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://builds.emberjs.com/tags/v1.11.3/ember.min.js --location | md5sum
97d4b6fe5d82ffac9d13d5357b824e83  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-1.11.3.min.zopfli.js.gz | md5sum
97d4b6fe5d82ffac9d13d5357b824e83  -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v1.11.3/ember.min.js --location | sha1sum
e9aa0eefef4c0b2887f51b9d75d53ff3b43e46cb  -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-1.11.3.min.zopfli.js.gz | sha1sum
e9aa0eefef4c0b2887f51b9d75d53ff3b43e46cb  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 131497 bytes 97d4b6fe5d82ffac9d13d5357b824e83 April 16, 2015 @ 15:06
cdnjs 108069 bytes 97d4b6fe5d82ffac9d13d5357b824e83 April 15, 2015 @ 08:15
cdnhttps 106512 bytes 97d4b6fe5d82ffac9d13d5357b824e83 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
102329 bytes -1 byte zopfli --i10000 --mls32 --bsr11 --lazy --ohh March 21, 2017 @ 16:29
102330 bytes -1 byte zopfli --i10000 --mls8 --bsr12 --lazy --ohh March 9, 2017 @ 01:08
102331 bytes -2 bytes zopfli --i10000 --mls512 --bsr16 --lazy --ohh March 7, 2017 @ 15:55
102333 bytes -2 bytes zopfli --i100000 --mls2048 --bsr9 --lazy --ohh July 22, 2016 @ 15:36
102335 bytes -5 bytes zopfli --i10000 --mls2048 --bsr9 --lazy --ohh November 22, 2015 @ 09:22
102340 bytes -1 byte zopfli --i1000 --mls2048 --bsr9 --lazy --ohh September 10, 2015 @ 22:03
102341 bytes -2 bytes zopfli --i1000 --mls512 --bsr11 --lazy --ohh September 10, 2015 @ 21:46
102343 bytes -29 bytes zopfli --i1000 --mls512 --bsr16 --lazy --ohh September 10, 2015 @ 21:37
102372 bytes zopfli --i100 --mls8192 --bsr13 --lazy --ohh September 10, 2015 @ 13:55

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 @ 21:09.

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
102375 102331 102340 102374 102387 102402 102401 102401 102375 102376 102381 102383 102371 102402 102374
102331 102335 102337 102336 102341 102332 102335 102334 102331 102334 102335 102336 102341 102351 102339
102376 102375 102336 102336 102367 102377 102364 102368 102371 102369 102370 102369 102376 102380 102378
102334 102341 102337 102335 102333 102337 102333 102335 102335 102334 102334 102336 102335 102343 102335
102334 102335 102334 102335 102334 102336 102335 102335 102335 102335 102334 102336 102341 102346 102341
102332 102332 102336 102341 102334 102337 102334 102335 102335 102334 102333 102336 102340 102349 102341
102335 102343 102337 102340 102333 102337 102335 102335 102335 102336 102335 102335 102335 102350 102340
102334 102334 102330 102335 102329 102336 102334 102335 102336 102334 102335 102334 102335 102345 102341
102337 102332 102330 102333 102334 102337 102335 102335 102335 102334 102336 102336 102340 102344 102341
102334 102334 102341 102335 102334 102337 102335 102334 102335 102334 102335 102336 102336 102350 102341
102335 102335 102337 102333 102334 102337 102333 102335 102335 102335 102333 102336 102342 102351 102340
102334 102334 102337 102335 102333 102337 102333 102335 102335 102333 102334 102335 102340 102353 102341
102335 102335 102335 102336 102335 102336 102335 102335 102331 102334 102338 102334 102341 102350 102336
102338 102344 102338 102336 102336 102337 102333 102336 102335 102335 102336 102334 102334 102345 102341
102330 102334 102341 102335 102329 102335 102336 102335 102335 102333 102336 102336 102335 102351 102341
102335 102332 102336 102335 102338 102336 102335 102335 102335 102334 102332 102336 102335 102344 102341
102335 102335 102341 102337 102338 102337 102335 102335 102335 102333 102334 102335 102335 102350 102341
102334 102334 102330 102333 102334 102337 102334 102335 102335 102333 102333 102336 102336 102350 102341
102335 102335 102338 102334 102334 102337 102335 102333 102335 102334 102335 102335 102340 102346 102340
102335 102335 102330 102335 102370 102337 102335 102335 102334 102334 102334 102335 102336 102345 102346
102332 102335 102330 102333 102334 102337 102335 102335 102334 102334 102335 102335 102343 102350 102340
102334 102335 102330 102333 102334 102334 102334 102336 102344 102334 102333 102334 102336 102345 102340
102336 102338 102338 102335 102333 102336 102335 102334 102335 102335 102335 102336 102341 102351 102341

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 102360 bytes 100%
1,000 102340 bytes -20 bytes 100%
10,000 102329 bytes -11 bytes 100%
100,000 102329 bytes 1.74%
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
102358 bytes +29 bytes (+0.03%)
102376 bytes +47 bytes (+0.05%) +18 bytes
102401 bytes +72 bytes (+0.07%) +43 bytes
102457 bytes +128 bytes (+0.13%) +99 bytes
102479 bytes +150 bytes (+0.15%) +121 bytes
102491 bytes +162 bytes (+0.16%) +133 bytes
102528 bytes +199 bytes (+0.19%) +170 bytes
102508 bytes +179 bytes (+0.17%) +150 bytes
102503 bytes +174 bytes (+0.17%) +145 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 70773 bytes -31556 bytes (-30.84%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 75357 bytes -26972 bytes (-26.36%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 80033 bytes -22296 bytes (-21.79%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 85692 bytes -16637 bytes (-16.26%)
Brotli (Wikipedia) brotli brotli -q 11 89632 bytes -12697 bytes (-12.41%)
LZMA2 (Wikipedia) xz xz -9 91560 bytes -10769 bytes (-10.52%)
Zstandard (Wikipedia) zstd zstd -19 94134 bytes -8195 bytes (-8.01%)

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