Choose a version:
27% The original file has 1812599 bytes (1,770.1k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 497670 bytes (486.0k, 27%).

After GZIP compression these minified files vary in size:
Boot
  155952 bytes (152.3k)
CDN, direct link
cdnjs
  128181 bytes (125.2k)
CDN, direct link
gzip -6 (default)
  126267 bytes (123.3k)
local copy
cdnhttps
  126262 bytes (123.3k)
CDN, direct link
gzip -9
  125814 bytes (122.9k)
local copy
7zip -mx=9 -tgzip
  121854 bytes (119.0k)
local copy
libdeflate -12
  121681 bytes (118.8k)
local copy
pigz -11 -n
  121430 bytes (118.6k)
local copy
kzip -s0 -rn -b0
  121284 bytes (118.4k)
local copy
Zopfli
  121236 bytes (118.4k)
local copy
Zopfli (defluff)
  121233 bytes (118.4k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-1.13.7.min.js

You will automatically get the smallest Ember 1.13.7 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 5026 bytes by using my Ember 1.13.7 Zopfli version instead of the best available CDN (4.15% smaller than cdnhttps, 121236 vs. 126262 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 --mls2 --bsr18 --lazy --ohh

(found March 27, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 2  --mls2
block splitting recursion 18  --bsr18
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 (121233 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://builds.emberjs.com/tags/v1.13.7/ember.min.js --location | md5sum
4f35317213f9aff2aa7b94e84e3969e7  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.13.7.min.zopfli.js.gz | md5sum
4f35317213f9aff2aa7b94e84e3969e7  -

SHA1:
curl --silent --compressed http://builds.emberjs.com/tags/v1.13.7/ember.min.js --location | sha1sum
fa211a9837dfeb3c3ac05a5c6e78d68352a0af8d  -
curl --silent --compressed http://minime.stephan-brumme.com/files/ember/ember-1.13.7.min.zopfli.js.gz | sha1sum
fa211a9837dfeb3c3ac05a5c6e78d68352a0af8d  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 155952 bytes 4f35317213f9aff2aa7b94e84e3969e7 August 11, 2015 @ 11:09
cdnjs 128181 bytes 4f35317213f9aff2aa7b94e84e3969e7 August 10, 2015 @ 11:33
cdnhttps 126262 bytes 4f35317213f9aff2aa7b94e84e3969e7 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:

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
121236 bytes -6 bytes zopfli --i100000 --mls2 --bsr18 --lazy --ohh March 27, 2017 @ 10:22
121242 bytes -8 bytes zopfli --i100000 --mls128 --bsr6 --lazy --ohh July 21, 2016 @ 16:48
121250 bytes -14 bytes zopfli --i10000 --mls128 --bsr6 --lazy --ohh October 5, 2015 @ 21:39
121264 bytes -3 bytes zopfli --i1000 --mls128 --bsr6 --lazy --ohh October 5, 2015 @ 20:20
121267 bytes -1 byte zopfli --i1000 --mls32 --bsr21 --lazy --ohh October 5, 2015 @ 20:15
121268 bytes -1 byte zopfli --i1000 --mls4 --bsr18 --lazy --ohh October 5, 2015 @ 20:13
121269 bytes -22 bytes zopfli --i1000 --mls8 --bsr22 --lazy --ohh October 5, 2015 @ 20:08
121291 bytes zopfli --i100 --mls128 --bsr6 --lazy --ohh October 5, 2015 @ 10:58

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 @ 10:34.

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
121416 121418 121422 121425 121457 121457 121464 121419 121465 121421 121418 121449 121463 121464 121430
121289 121278 121284 121264 121390 121384 121283 121298 121290 121295 121303 121449 121463 121275 121411
121270 121275 121265 121256 121264 121269 121242 121263 121273 121263 121269 121449 121463 121264 121307
121285 121290 121384 121260 121276 121267 121269 121267 121275 121308 121304 121449 121463 121254 121396
121311 121257 121257 121387 121384 121385 121386 121396 121388 121387 121384 121388 121390 121397 121390
121258 121283 121285 121258 121388 121261 121387 121392 121395 121383 121383 121397 121393 121393 121399
121253 121273 121257 121270 121256 121388 121388 121397 121395 121388 121396 121384 121393 121415 121391
121285 121253 121260 121395 121387 121383 121387 121393 121388 121384 121383 121387 121392 121411 121390
121253 121257 121260 121259 121385 121383 121387 121383 121388 121383 121387 121387 121389 121393 121399
121278 121276 121260 121387 121387 121388 121389 121385 121387 121388 121383 121388 121392 121393 121391
121256 121279 121264 121288 121383 121384 121387 121397 121387 121388 121383 121389 121395 121392 121390
121252 121252 121253 121255 121255 121384 121388 121397 121385 121383 121383 121397 121395 121397 121391
121257 121272 121257 121387 121390 121256 121388 121393 121388 121383 121396 121386 121392 121387 121389
121276 121383 121385 121396 121384 121384 121387 121397 121395 121388 121391 121397 121395 121411 121396
121236 121253 121257 121386 121390 121259 121387 121402 121393 121394 121388 121387 121389 121397 121401
121257 121257 121259 121257 121255 121384 121387 121396 121395 121383 121382 121386 121400 121392 121403
121290 121275 121383 121395 121255 121388 121387 121392 121384 121385 121387 121397 121389 121393 121392
121280 121278 121384 121395 121255 121256 121387 121397 121404 121387 121390 121384 121393 121392 121391
121278 121278 121256 121395 121387 121257 121389 121400 121396 121388 121383 121387 121390 121393 121392
121302 121256 121261 121271 121254 121263 121389 121385 121383 121383 121387 121397 121388 121393 121391
121283 121275 121386 121395 121390 121385 121387 121393 121387 121384 121383 121397 121393 121393 121392
121311 121387 121386 121396 121256 121278 121389 121401 121394 121384 121387 121384 121391 121393 121392
121258 121271 121258 121387 121384 121387 121389 121395 121385 121384 121387 121397 121389 121388 121397

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 121291 bytes 100%
1,000 121264 bytes -27 bytes 100%
10,000 121250 bytes -14 bytes 100%
100,000 121236 bytes -14 bytes 0.58%
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
121284 bytes +48 bytes (+0.04%)
121419 bytes +183 bytes (+0.15%) +135 bytes
121435 bytes +199 bytes (+0.16%) +151 bytes
121380 bytes +144 bytes (+0.12%) +96 bytes
121325 bytes +89 bytes (+0.07%) +41 bytes
121300 bytes +64 bytes (+0.05%) +16 bytes
121346 bytes +110 bytes (+0.09%) +62 bytes
121396 bytes +160 bytes (+0.13%) +112 bytes
121445 bytes +209 bytes (+0.17%) +161 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 82544 bytes -38692 bytes (-31.91%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 88681 bytes -32555 bytes (-26.85%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 95960 bytes -25276 bytes (-20.85%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 100695 bytes -20541 bytes (-16.94%)
Brotli (Wikipedia) brotli brotli -q 11 105477 bytes -15759 bytes (-13.00%)
LZMA2 (Wikipedia) xz xz -9 107624 bytes -13612 bytes (-11.23%)
ZSTD (Wikipedia) zstd zstd -19 110692 bytes -10544 bytes (-8.70%)

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