Ember 2.10.0 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 2600725 bytes (2,539.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 526408 bytes (514.1k, 20%).

After GZIP compression these minified files vary in size:

Boot	162488 bytes (158.7k)	CDN
cdnjs	132637 bytes (129.5k)	CDN
gzip -6 (default)	130762 bytes (127.7k)	local copy
gzip -9	130273 bytes (127.2k)	local copy
jsdelivr	129573 bytes (126.5k)	CDN
7zip -mx=9 -tgzip	125782 bytes (122.8k)	local copy
zultra	125637 bytes (122.7k)	local copy
libdeflate -12	125614 bytes (122.7k)	local copy
pigz -11 -n	125518 bytes (122.6k)	local copy
kzip -s0 -rn -b5	125264 bytes (122.3k)	local copy
Zopfli	125234 bytes (122.3k)	local copy
Zopfli (defluff)	125231 bytes (122.3k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.10.0.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.10.0 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 4339 bytes by using my Ember 2.10.0 Zopfli version instead of the best available CDN (3.46% smaller than jsdelivr, 125234 vs. 129573 bytes):

Download

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 --mls16384 --bsr4 --lazy --ohh

(found November 29, 2016)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	16384	--mls16384
block splitting recursion	4	--bsr4
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 (125231 bytes).

Download

Verify file integrity

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

MD5:
curl --silent --compressed https://builds.emberjs.com/tags/v2.10.0/ember.min.js --location | md5sum
984ab5bf8fc6be18f2f362dcc3d1525d -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.10.0.min.zopfli.js.gz | md5sum
984ab5bf8fc6be18f2f362dcc3d1525d -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.10.0/ember.min.js --location | sha1sum
3446c66a00d0bd408cf4eda57cf308d0a44215ca -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.10.0.min.zopfli.js.gz | sha1sum
3446c66a00d0bd408cf4eda57cf308d0a44215ca -

These CDNs send you the original file:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	162488 bytes	984ab5bf8fc6be18f2f362dcc3d1525d	December 2, 2016 @ 03:42
cdnjs	132637 bytes	984ab5bf8fc6be18f2f362dcc3d1525d	November 29, 2016 @ 07:32

And some CDNs send you a different file:

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
jsdelivr	129573 bytes	4347beeac987b2c14d56237b0b2e9eaa	< !function(){function e(e,t){e.prototype=Object.create(t&&t [...] < try{if(r.isTesting()\|\|(i.Namespace.processAll(),i.setNames [...] < }}),s("ember-glimmer/helpers/-html-safe",["exports","ember [...] < return t},e.prototype.didCreateElement=function(){},e.prot [...] < var r=this._chains,i=void 0;void 0===r?r=this._chains=new [...] < "constructor"!==l&&o.hasOwnProperty(l)&&(h=r[l],c=o[l],h!= [...] < "use strict";function s(){return this}function a(e,t){if(! [...] < }:function(e){return n.get(e,t)===r},m(e+".@each."+t,i)}fu [...] < var e=t.get(this,"arrangedContent");e&&s.addArrayObserver( [...] < t.run._addQueue("afterRender","render")}),s("ember-views/s [...] [...]	(invalid)

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
125234 bytes	-3 bytes	zopfli --i100000 --mls16384 --bsr4 --lazy --ohh	November 29, 2016 @ 16:24
125237 bytes	-13 bytes	zopfli --i10000 --mls16384 --bsr4 --lazy --ohh	November 29, 2016 @ 13:28
125250 bytes	-23 bytes	zopfli --i1000 --mls16384 --bsr4 --lazy --ohh	November 29, 2016 @ 13:10
125273 bytes	–	zopfli --i100 --mls16384 --bsr4 --lazy --ohh	November 29, 2016 @ 11:48

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

Most recent activity on July 20, 2020 @ 12:48.

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
2	125383	125383	125383	125383	125384	125384	125384	125384	125296	125345	125378	125378	125383	125327	125384
4	125311	125309	125383	125383	125384	125384	125384	125292	125263	125257	125258	125378	125383	125234	125384
6	125318	125314	125317	125323	125317	125321	125316	125321	125305	125291	125313	125266	125307	125255	125307
7	125245	125304	125320	125315	125316	125315	125315	125319	125293	125330	125266	125378	125383	125253	125323
8	125316	125320	125315	125320	125317	125315	125320	125319	125293	125272	125270	125378	125298	125254	125307
9	125315	125315	125315	125321	125314	125320	125313	125313	125301	125261	125273	125264	125301	125256	125312
10	125320	125319	125315	125315	125321	125315	125321	125319	125301	125261	125269	125255	125293	125255	125307
11	125319	125314	125315	125315	125318	125315	125315	125319	125315	125254	125273	125272	125294	125255	125307
12	125320	125319	125320	125314	125332	125317	125319	125314	125304	125258	125278	125260	125300	125254	125305
13	125317	125322	125315	125315	125315	125315	125321	125319	125305	125273	125281	125298	125301	125252	125319
14	125255	125258	125334	125315	125305	125306	125307	125319	125314	125259	125271	125311	125305	125252	125307
15	125320	125319	125321	125315	125318	125313	125315	125319	125315	125260	125272	125265	125303	125253	125327
16	125315	125315	125315	125315	125320	125319	125320	125314	125304	125255	125277	125270	125300	125243	125307
17	125320	125319	125315	125315	125316	125321	125315	125319	125315	125252	125282	125256	125300	125252	125316
18	125318	125314	125320	125315	125320	125317	125321	125319	125303	125264	125281	125266	125305	125258	125306
19	125319	125315	125321	125316	125314	125321	125306	125319	125306	125298	125272	125263	125305	125250	125306
20	125318	125314	125321	125315	125315	125318	125319	125315	125307	125274	125276	125260	125299	125256	125318
21	125319	125314	125315	125315	125320	125320	125321	125316	125304	125300	125259	125255	125301	125255	125307
22	125319	125314	125315	125315	125314	125317	125315	125314	125305	125286	125283	125258	125297	125254	125306
23	125318	125314	125315	125315	125318	125315	125321	125314	125308	125258	125257	125255	125298	125257	125307
25	125319	125314	125315	125315	125321	125316	125320	125317	125302	125264	125277	125255	125297	125251	125306
30	125319	125315	125314	125315	125315	125317	125315	125318	125316	125261	125257	125262	125301	125253	125307
40	125317	125322	125315	125315	125315	125319	125320	125317	125317	125267	125272	125264	125299	125271	125306

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	125273 bytes	–	100%
1,000	125250 bytes	-23 bytes	100%
10,000	125237 bytes	-13 bytes	100%
100,000	125234 bytes	-3 bytes	0.87%
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
(any)	125338 bytes	+104 bytes (+0.08%)	+74 bytes
1	125356 bytes	+122 bytes (+0.10%)	+92 bytes
2	125391 bytes	+157 bytes (+0.13%)	+127 bytes
3	125401 bytes	+167 bytes (+0.13%)	+137 bytes
4	125342 bytes	+108 bytes (+0.09%)	+78 bytes
5	125264 bytes	+30 bytes (+0.02%)	–
6	125335 bytes	+101 bytes (+0.08%)	+71 bytes
7	125350 bytes	+116 bytes (+0.09%)	+86 bytes
8	125397 bytes	+163 bytes (+0.13%)	+133 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 - for example, your browser actually supports it !

Algorithm	Program	Parameters	Size	Compared To Best Zopfli
ZPAQ (Wikipedia)	zpaq	zpaq -method 69	84927 bytes	-40307 bytes (-32.19%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	91870 bytes	-33364 bytes (-26.64%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	95470 bytes	-29764 bytes (-23.77%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	105352 bytes	-19882 bytes (-15.88%)
Brotli (Wikipedia)	brotli	brotli -q 11	109141 bytes	-16093 bytes (-12.85%)
LZMA2 (Wikipedia)	xz	xz -9	111004 bytes	-14230 bytes (-11.36%)
Zstandard (Wikipedia)	zstd	zstd -19	114397 bytes	-10837 bytes (-8.65%)

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):

Load and Parse Data

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 2024.
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

All trademarks are property of their respective owners. You know, the boring legal stuff.