Choose a version:
28% The original file has 1805069 bytes (1,762.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 497042 bytes (485.4k, 28%).

After GZIP compression these minified files vary in size:
Boot
  155960 bytes (152.3k)
CDN
cdnjs
  128278 bytes (125.3k)
CDN
gzip -6 (default)
  126381 bytes (123.4k)
local copy
cdnhttps
  126378 bytes (123.4k)
CDN
gzip -9
  125924 bytes (123.0k)
local copy
7zip -mx=9 -tgzip
  121933 bytes (119.1k)
local copy
libdeflate -12
  121791 bytes (118.9k)
local copy
pigz -11 -n
  121507 bytes (118.7k)
local copy
kzip -s0 -rn -b0
  121370 bytes (118.5k)
local copy
Zopfli
  121318 bytes (118.5k)
local copy
Zopfli (defluff)
  121316 bytes (118.5k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-1.13.6.min.js

You will automatically get the smallest Ember 1.13.6 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 5060 bytes by using my Ember 1.13.6 Zopfli version instead of the best available CDN (4.17% smaller than cdnhttps, 121318 vs. 126378 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 --mls32768 --bsr19 --lazy --ohh

(found March 27, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 32768  --mls32768
block splitting recursion 19  --bsr19
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 2 more bytes (121316 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v1.13.6/ember.min.js --location | md5sum
dfdfa2f0b37ae8b862991609250f3873  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.13.6.min.zopfli.js.gz | md5sum
dfdfa2f0b37ae8b862991609250f3873  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v1.13.6/ember.min.js --location | sha1sum
fa4495b3fd90b61356d7ccf087b26d70e92032e1  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.13.6.min.zopfli.js.gz | sha1sum
fa4495b3fd90b61356d7ccf087b26d70e92032e1  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 155960 bytes dfdfa2f0b37ae8b862991609250f3873 August 2, 2015 @ 18:27
cdnjs 128278 bytes dfdfa2f0b37ae8b862991609250f3873 August 2, 2015 @ 09:18
cdnhttps 126378 bytes dfdfa2f0b37ae8b862991609250f3873 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
121318 bytes -4 bytes zopfli --i100000 --mls32768 --bsr19 --lazy --ohh March 27, 2017 @ 14:10
121322 bytes -6 bytes zopfli --i100000 --mls64 --bsr16 --lazy --ohh July 21, 2016 @ 16:48
121328 bytes -1 byte zopfli --i10000 --mls64 --bsr13 --lazy --ohh October 6, 2015 @ 05:30
121329 bytes -11 bytes zopfli --i10000 --mls4 --bsr15 --lazy --ohh October 6, 2015 @ 05:20
121340 bytes -1 byte zopfli --i1000 --mls64 --bsr20 --lazy --ohh October 5, 2015 @ 22:37
121341 bytes -9 bytes zopfli --i1000 --mls64 --bsr13 --lazy --ohh October 5, 2015 @ 22:33
121350 bytes -23 bytes zopfli --i1000 --mls32 --bsr12 --lazy --ohh October 5, 2015 @ 22:22
121373 bytes zopfli --i100 --mls64 --bsr15 --lazy --ohh October 5, 2015 @ 11:43

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

Most recent activity on March 27, 2017 @ 20:39.

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
121489 121494 121494 121492 121489 121488 121489 121489 121492 121493 121492 121530 121536 121541 121496
121424 121384 121370 121347 121371 121381 121350 121360 121358 121349 121360 121530 121536 121350 121486
121347 121358 121341 121362 121403 121342 121340 121345 121339 121338 121482 121477 121536 121345 121392
121388 121376 121384 121354 121396 121352 121345 121373 121339 121349 121477 121376 121536 121332 121375
121399 121369 121357 121376 121481 121342 121473 121485 121474 121468 121469 121476 121536 121480 121385
121336 121338 121346 121333 121354 121356 121357 121472 121365 121470 121471 121481 121536 121477 121335
121355 121351 121338 121338 121339 121346 121355 121468 121366 121470 121469 121472 121484 121479 121367
121373 121385 121381 121388 121471 121361 121472 121365 121344 121470 121471 121472 121478 121477 121363
121332 121335 121331 121338 121336 121340 121351 121471 121469 121469 121469 121475 121479 121478 121477
121394 121369 121393 121371 121472 121322 121346 121477 121355 121470 121469 121472 121479 121480 121365
121335 121365 121357 121353 121367 121352 121348 121468 121356 121470 121468 121472 121484 121480 121488
121322 121329 121341 121341 121362 121338 121362 121468 121357 121472 121469 121475 121484 121480 121478
121383 121389 121332 121380 121474 121322 121349 121469 121474 121469 121482 121472 121478 121476 121477
121371 121391 121379 121360 121474 121340 121360 121468 121357 121470 121481 121475 121485 121478 121341
121321 121333 121380 121357 121332 121334 121352 121344 121359 121471 121482 121472 121475 121479 121483
121343 121337 121345 121332 121358 121357 121341 121478 121360 121469 121473 121475 121475 121479 121318
121386 121393 121388 121390 121474 121323 121364 121470 121471 121475 121472 121472 121479 121480 121475
121400 121393 121378 121380 121472 121357 121356 121468 121358 121470 121472 121470 121484 121478 121343
121390 121375 121382 121378 121472 121341 121362 121369 121362 121470 121469 121472 121476 121477 121341
121380 121337 121381 121386 121355 121344 121361 121472 121365 121469 121468 121472 121475 121477 121329
121374 121391 121381 121363 121473 121363 121355 121355 121471 121471 121469 121472 121480 121477 121478
121379 121391 121382 121362 121472 121365 121363 121356 121388 121471 121474 121468 121477 121478 121478
121341 121345 121331 121334 121481 121340 121472 121472 121357 121470 121469 121475 121475 121475 121477

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 121373 bytes 100%
1,000 121340 bytes -33 bytes 100%
10,000 121327 bytes -13 bytes 100%
100,000 121318 bytes -9 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
121370 bytes +52 bytes (+0.04%)
121507 bytes +189 bytes (+0.16%) +137 bytes
121508 bytes +190 bytes (+0.16%) +138 bytes
121466 bytes +148 bytes (+0.12%) +96 bytes
121400 bytes +82 bytes (+0.07%) +30 bytes
121382 bytes +64 bytes (+0.05%) +12 bytes
121430 bytes +112 bytes (+0.09%) +60 bytes
121457 bytes +139 bytes (+0.11%) +87 bytes
121518 bytes +200 bytes (+0.16%) +148 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 82563 bytes -38755 bytes (-31.94%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 88700 bytes -32618 bytes (-26.89%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 96036 bytes -25282 bytes (-20.84%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 100824 bytes -20494 bytes (-16.89%)
Brotli (Wikipedia) brotli brotli -q 11 105390 bytes -15928 bytes (-13.13%)
LZMA2 (Wikipedia) xz xz -9 107644 bytes -13674 bytes (-11.27%)
ZSTD (Wikipedia) zstd zstd -19 110705 bytes -10613 bytes (-8.75%)

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