Ember 2.7.1 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1654421 bytes (1,615.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 428693 bytes (418.6k, 26%).

After GZIP compression these minified files vary in size:

Boot	139356 bytes (136.1k)	CDN
cdnjs	114353 bytes (111.7k)	CDN
gzip -6 (default)	112723 bytes (110.1k)	local copy
gzip -9	112361 bytes (109.7k)	local copy
7zip -mx=9 -tgzip	108479 bytes (105.9k)	local copy
zultra	108368 bytes (105.8k)	local copy
pigz -11 -n	108293 bytes (105.8k)	local copy
libdeflate -12	108200 bytes (105.7k)	local copy
kzip -s0 -rn -b0	108100 bytes (105.6k)	local copy
Zopfli	108057 bytes (105.5k)	local copy
Zopfli (defluff)	108054 bytes (105.5k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-2.7.1.min.js (or via HTTPS)

You will automatically get the smallest Ember 2.7.1 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 6296 bytes by using my Ember 2.7.1 Zopfli version instead of the best available CDN (5.83% smaller than cdnjs, 108057 vs. 114353 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 --mls8 --bsr7 --lazy --ohh

(found August 18, 2016)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	8	--mls8
block splitting recursion	7	--bsr7
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 (108054 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/v2.7.1/ember.min.js --location | md5sum
1805ef7bece3110ef1b62abe0576f2a6 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.7.1.min.zopfli.js.gz | md5sum
1805ef7bece3110ef1b62abe0576f2a6 -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v2.7.1/ember.min.js --location | sha1sum
6028396bbb43b45329fc2c8cec0b031af648cf2c -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-2.7.1.min.zopfli.js.gz | sha1sum
6028396bbb43b45329fc2c8cec0b031af648cf2c -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	139356 bytes	1805ef7bece3110ef1b62abe0576f2a6	August 20, 2016 @ 16:17
cdnjs	114353 bytes	1805ef7bece3110ef1b62abe0576f2a6	August 16, 2016 @ 05:16

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
108057 bytes	-4 bytes	zopfli --i1000000 --mls8 --bsr7 --lazy --ohh	August 18, 2016 @ 06:46
108061 bytes	-2 bytes	zopfli --i100000 --mls64 --bsr4 --lazy --ohh	August 17, 2016 @ 01:29
108063 bytes	-5 bytes	zopfli --i100000 --mls32768 --bsr18 --lazy --ohh	August 16, 2016 @ 12:17
108068 bytes	-1 byte	zopfli --i10000 --mls32768 --bsr18 --lazy --ohh	August 16, 2016 @ 10:14
108069 bytes	-17 bytes	zopfli --i1000 --mls32768 --bsr18 --lazy --ohh	August 16, 2016 @ 09:59
108086 bytes	–	zopfli --i100 --mls32768 --bsr18 --lazy --ohh	August 16, 2016 @ 09:43

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	108069	108071	108078	108074	108082	108074	108075	108074	108074	108072	108074	108079	108074	108081	108072
4	108070	108070	108070	108071	108082	108061	108074	108070	108080	108080	108077	108069	108084	108082	108084
6	108072	108070	108069	108071	108069	108070	108071	108072	108071	108074	108077	108095	108082	108082	108079
7	108072	108071	108057	108070	108068	108072	108071	108069	108070	108071	108076	108069	108081	108081	108079
8	108072	108071	108069	108071	108068	108072	108072	108069	108070	108071	108065	108068	108084	108082	108082
9	108069	108071	108068	108071	108067	108071	108072	108069	108071	108071	108071	108081	108084	108080	108080
10	108072	108071	108075	108071	108069	108071	108071	108069	108082	108071	108076	108070	108071	108081	108080
11	108069	108071	108069	108068	108074	108075	108071	108069	108071	108062	108076	108069	108084	108081	108084
12	108072	108071	108072	108071	108071	108071	108071	108072	108078	108069	108076	108069	108084	108081	108084
13	108069	108071	108069	108071	108082	108071	108071	108069	108071	108069	108075	108070	108082	108081	108085
14	108072	108070	108072	108071	108069	108071	108071	108069	108071	108071	108079	108080	108083	108079	108085
15	108071	108071	108072	108068	108068	108071	108071	108069	108071	108071	108076	108071	108082	108075	108080
16	108072	108071	108124	108071	108070	108071	108064	108112	108076	108082	108078	108080	108070	108081	108080
17	108072	108071	108069	108072	108070	108071	108064	108078	108076	108062	108071	108079	108084	108082	108085
18	108070	108071	108071	108071	108069	108072	108072	108069	108071	108071	108075	108070	108079	108081	108063
19	108069	108071	108068	108071	108069	108071	108071	108072	108082	108081	108075	108070	108077	108081	108081
20	108069	108071	108069	108068	108068	108072	108071	108070	108070	108075	108076	108079	108074	108082	108080
21	108072	108070	108069	108070	108068	108072	108064	108070	108070	108071	108075	108081	108082	108082	108085
22	108072	108070	108063	108068	108068	108071	108071	108072	108070	108067	108076	108071	108082	108080	108082
23	108072	108071	108068	108071	108069	108071	108078	108070	108071	108071	108071	108081	108081	108080	108084
25	108072	108070	108072	108071	108068	108071	108076	108069	108070	108072	108076	108077	108071	108080	108083
30	108071	108071	108072	108071	108069	108072	108071	108071	108080	108071	108076	108079	108083	108154	108085
40	108070	108070	108063	108069	108074	108074	108071	108069	108071	108069	108076	108069	108085	108082	108082

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	108086 bytes	–	100%
1,000	108069 bytes	-17 bytes	100%
10,000	108066 bytes	-3 bytes	100%
100,000	108061 bytes	-5 bytes	3.48%
1,000,000	108057 bytes	-4 bytes	1.16%
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)	108100 bytes	+43 bytes (+0.04%)	–
1	108107 bytes	+50 bytes (+0.05%)	+7 bytes
2	108142 bytes	+85 bytes (+0.08%)	+42 bytes
3	108107 bytes	+50 bytes (+0.05%)	+7 bytes
4	108154 bytes	+97 bytes (+0.09%)	+54 bytes
5	108209 bytes	+152 bytes (+0.14%)	+109 bytes
6	108262 bytes	+205 bytes (+0.19%)	+162 bytes
7	108290 bytes	+233 bytes (+0.22%)	+190 bytes
8	108339 bytes	+282 bytes (+0.26%)	+239 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	74105 bytes	-33952 bytes (-31.42%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	79205 bytes	-28852 bytes (-26.70%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	85685 bytes	-22372 bytes (-20.70%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	90292 bytes	-17765 bytes (-16.44%)
Brotli (Wikipedia)	brotli	brotli -q 11	94288 bytes	-13769 bytes (-12.74%)
LZMA2 (Wikipedia)	xz	xz -9	96456 bytes	-11601 bytes (-10.74%)
Zstandard (Wikipedia)	zstd	zstd -19	99096 bytes	-8961 bytes (-8.29%)

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.