Ember 2.6.0 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1642825 bytes (1,604.3k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 433287 bytes (423.1k, 26%).

After GZIP compression these minified files vary in size:

Boot	139822 bytes (136.5k)	CDN
cdnjs	114791 bytes (112.1k)	CDN
gzip -6 (default)	113186 bytes (110.5k)	local copy
gzip -9	112801 bytes (110.2k)	local copy
jsdelivr	112743 bytes (110.1k)	CDN
7zip -mx=9 -tgzip	108962 bytes (106.4k)	local copy
zultra	108864 bytes (106.3k)	local copy
pigz -11 -n	108845 bytes (106.3k)	local copy
libdeflate -12	108832 bytes (106.3k)	local copy
kzip -s0 -rn -b3	108651 bytes (106.1k)	local copy
Zopfli	108610 bytes (106.1k)	local copy
Zopfli (defluff)	108609 bytes (106.1k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.6.0.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.6.0 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 4133 bytes by using my Ember 2.6.0 Zopfli version instead of the best available CDN (3.81% smaller than jsdelivr, 108610 vs. 112743 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 --i1000000 --mb8 --mls64 --bsr6 --lazy --ohh

(found June 13, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	64	--mls64
block splitting recursion	6	--bsr6
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 (108609 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/v2.6.0/ember.min.js --location | md5sum
3354edc620ccc1038612e26884f34c2d -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.6.0.min.zopfli.js.gz | md5sum
3354edc620ccc1038612e26884f34c2d -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.6.0/ember.min.js --location | sha1sum
f153f87a30544bb0c50ec9130933c341d3c4af17 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.6.0.min.zopfli.js.gz | sha1sum
f153f87a30544bb0c50ec9130933c341d3c4af17 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	139822 bytes	3354edc620ccc1038612e26884f34c2d	June 9, 2016 @ 09:39
cdnjs	114791 bytes	3354edc620ccc1038612e26884f34c2d	June 8, 2016 @ 17:16
jsdelivr	112743 bytes	3354edc620ccc1038612e26884f34c2d	June 8, 2016 @ 17:03

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
108610 bytes	-1 byte	zopfli --i1000000 --mls64 --bsr6 --lazy --ohh	June 13, 2016 @ 23:21
108611 bytes	-2 bytes	zopfli --i100000 --mls64 --bsr6 --lazy --ohh	June 10, 2016 @ 07:47
108613 bytes	-4 bytes	zopfli --i100000 --mls256 --bsr22 --lazy --ohh	June 10, 2016 @ 04:56
108617 bytes	-4 bytes	zopfli --i10000 --mls32768 --bsr6 --lazy --ohh	June 9, 2016 @ 10:40
108621 bytes	-2 bytes	zopfli --i1000 --mls32768 --bsr6 --lazy --ohh	June 9, 2016 @ 10:21
108623 bytes	-2 bytes	zopfli --i1000 --mls512 --bsr19 --lazy --ohh	June 9, 2016 @ 10:20
108625 bytes	-2 bytes	zopfli --i1000 --mls16 --bsr12 --lazy --ohh	June 9, 2016 @ 10:14
108627 bytes	-14 bytes	zopfli --i1000 --mls64 --bsr8 --lazy --ohh	June 9, 2016 @ 10:14
108641 bytes	–	zopfli --i100 --mls64 --bsr10 --lazy --ohh	June 9, 2016 @ 10:03

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 @ 12:50.

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, 100,000 or 1,000,000.

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	108627	108628	108628	108628	108625	108633	108622	108622	108622	108682	108682	108682	108680	108685	108622
4	108619	108619	108618	108620	108619	108610	108618	108617	108620	108631	108628	108622	108630	108633	108618
6	108619	108617	108618	108619	108618	108610	108617	108629	108618	108611	108619	108623	108627	108623	108617
7	108619	108618	108618	108618	108619	108618	108619	108617	108620	108619	108619	108632	108630	108621	108622
8	108618	108619	108619	108618	108612	108620	108618	108618	108616	108619	108619	108632	108630	108619	108622
9	108618	108618	108617	108618	108619	108619	108619	108619	108619	108619	108618	108619	108630	108619	108618
10	108619	108619	108619	108619	108617	108620	108619	108618	108620	108617	108619	108627	108628	108621	108622
11	108619	108619	108618	108619	108612	108619	108619	108618	108618	108617	108618	108632	108633	108624	108617
12	108618	108620	108617	108618	108619	108620	108619	108617	108618	108619	108626	108627	108632	108621	108622
13	108619	108619	108617	108619	108619	108619	108617	108618	108619	108617	108619	108627	108629	108623	108622
14	108618	108619	108618	108618	108612	108620	108619	108618	108619	108617	108619	108619	108630	108619	108622
15	108619	108619	108618	108618	108619	108620	108619	108619	108620	108617	108619	108632	108630	108623	108617
16	108618	108620	108617	108620	108618	108613	108620	108617	108619	108618	108625	108627	108638	108630	108622
17	108618	108620	108617	108619	108618	108613	108619	108618	108619	108622	108617	108628	108620	108622	108619
18	108619	108620	108618	108618	108619	108619	108618	108618	108619	108619	108619	108623	108630	108619	108618
19	108618	108618	108617	108619	108617	108619	108617	108618	108619	108617	108618	108622	108619	108620	108622
20	108618	108619	108617	108620	108619	108619	108619	108618	108618	108619	108624	108628	108619	108621	108622
21	108619	108619	108618	108619	108619	108619	108617	108617	108618	108617	108619	108628	108618	108619	108622
22	108619	108619	108619	108620	108619	108619	108618	108613	108620	108620	108627	108629	108632	108619	108616
23	108619	108619	108617	108618	108619	108620	108619	108619	108620	108617	108619	108632	108637	108623	108622
25	108619	108620	108619	108619	108619	108620	108619	108619	108618	108617	108626	108628	108630	108619	108622
30	108619	108619	108617	108619	108618	108613	108619	108618	108620	108620	108635	108621	108620	108621	108623
40	108618	108619	108619	108613	108612	108619	108612	108619	108617	108618	108618	108632	108618	108619	108617

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	108641 bytes	–	100%
1,000	108619 bytes	-22 bytes	100%
10,000	108617 bytes	-2 bytes	100%
100,000	108611 bytes	-6 bytes	14.78%
1,000,000	108610 bytes	-1 byte	0.87%
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)	108654 bytes	+44 bytes (+0.04%)	+3 bytes
1	108653 bytes	+43 bytes (+0.04%)	+2 bytes
2	108695 bytes	+85 bytes (+0.08%)	+44 bytes
3	108651 bytes	+41 bytes (+0.04%)	–
4	108714 bytes	+104 bytes (+0.10%)	+63 bytes
5	108771 bytes	+161 bytes (+0.15%)	+120 bytes
6	108806 bytes	+196 bytes (+0.18%)	+155 bytes
7	108830 bytes	+220 bytes (+0.20%)	+179 bytes
8	108886 bytes	+276 bytes (+0.25%)	+235 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	74376 bytes	-34234 bytes (-31.52%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	79322 bytes	-29288 bytes (-26.97%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	85779 bytes	-22831 bytes (-21.02%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	90385 bytes	-18225 bytes (-16.78%)
Brotli (Wikipedia)	brotli	brotli -q 11	94443 bytes	-14167 bytes (-13.04%)
LZMA2 (Wikipedia)	xz	xz -9	96632 bytes	-11978 bytes (-11.03%)
Zstandard (Wikipedia)	zstd	zstd -19	99385 bytes	-9225 bytes (-8.49%)

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.