Ember 1.10.1 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 1623893 bytes (1,585.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 382966 bytes (374.0k, 24%).

After GZIP compression these minified files vary in size:

Boot	128982 bytes (126.0k)	CDN
cdnjs	106876 bytes (104.4k)	CDN
gzip -6 (default)	105480 bytes (103.0k)	local copy
gzip -9	105133 bytes (102.7k)	local copy
7zip -mx=9 -tgzip	101780 bytes (99.4k)	local copy
libdeflate -12	101574 bytes (99.2k)	local copy
pigz -11 -n	101507 bytes (99.1k)	local copy
zultra	101471 bytes (99.1k)	local copy
kzip -s0 -rn -b0	101337 bytes (99.0k)	local copy
Zopfli	101254 bytes (98.9k)	local copy
Zopfli (defluff)	101252 bytes (98.9k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/ember/ember-1.10.1.min.js (or via HTTPS)

You will automatically get the smallest Ember 1.10.1 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 5622 bytes by using my Ember 1.10.1 Zopfli version instead of the best available CDN (5.55% smaller than cdnjs, 101254 vs. 106876 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 --mls32 --bsr20 --lazy --ohh

(found July 21, 2016)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	32	--mls32
block splitting recursion	20	--bsr20
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 (101252 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/v1.10.1/ember.min.js --location | md5sum
40b58502e1c2eb2d4ee4370788f3c5a7 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-1.10.1.min.zopfli.js.gz | md5sum
40b58502e1c2eb2d4ee4370788f3c5a7 -

SHA1:
curl --silent --compressed https://builds.emberjs.com/tags/v1.10.1/ember.min.js --location | sha1sum
b899becbe5f298b048b40b5b87bd9a5a8fbb26d0 -
curl --silent --compressed https://minime.stephan-brumme.com/files/ember/ember-1.10.1.min.zopfli.js.gz | sha1sum
b899becbe5f298b048b40b5b87bd9a5a8fbb26d0 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	128982 bytes	40b58502e1c2eb2d4ee4370788f3c5a7	April 16, 2015 @ 14:54
cdnjs	106876 bytes	40b58502e1c2eb2d4ee4370788f3c5a7	April 15, 2015 @ 08:15

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
101254 bytes	-2 bytes	zopfli --i100000 --mls32 --bsr20 --lazy --ohh	July 21, 2016 @ 20:56
101256 bytes	-5 bytes	zopfli --i10000 --mls32 --bsr20 --lazy --ohh	November 22, 2015 @ 10:00
101261 bytes	-1 byte	zopfli --i10000 --mls4096 --bsr25 --lazy --ohh	November 22, 2015 @ 09:17
101262 bytes	-7 bytes	zopfli --i10000 --mls2 --bsr6 --lazy --ohh	October 14, 2015 @ 01:08
101269 bytes	-2 bytes	zopfli --i1000 --mls2 --bsr6 --lazy --ohh	September 23, 2015 @ 03:34
101271 bytes	-9 bytes	zopfli --i1000 --mls4096 --bsr13 --lazy --ohh	September 10, 2015 @ 23:08
101280 bytes	-23 bytes	zopfli --i1000 --mls4096 --bsr12 --lazy --ohh	September 10, 2015 @ 23:06
101303 bytes	–	zopfli --i100 --mls4096 --bsr10 --lazy --ohh	September 10, 2015 @ 13:53

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 @ 13:05.

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	101310	101310	101310	101315	101313	101312	101323	101329	101305	101355	101353	101347	101353	101347	101324
4	101322	101321	101322	101323	101338	101322	101322	101321	101322	101330	101321	101395	101314	101329	101328
6	101262	101314	101320	101283	101321	101322	101285	101321	101321	101328	101321	101270	101308	101283	101323
7	101320	101321	101278	101257	101322	101322	101281	101321	101321	101321	101322	101269	101270	101270	101344
8	101321	101321	101351	101279	101323	101322	101322	101320	101322	101322	101322	101282	101283	101261	101333
9	101321	101321	101321	101279	101254	101322	101282	101322	101322	101320	101322	101262	101266	101270	101327
10	101320	101320	101351	101322	101322	101322	101283	101321	101322	101321	101322	101264	101276	101280	101328
11	101321	101322	101281	101278	101281	101278	101321	101321	101322	101339	101320	101280	101266	101271	101326
12	101322	101321	101322	101263	101322	101322	101286	101321	101322	101322	101320	101265	101270	101269	101331
13	101321	101321	101281	101322	101278	101339	101280	101321	101322	101321	101322	101254	101271	101269	101323
14	101323	101323	101280	101284	101279	101322	101295	101323	101339	101321	101321	101326	101268	101268	101326
15	101339	101339	101277	101279	101321	101322	101281	101322	101322	101322	101322	101327	101272	101334	101332
16	101321	101321	101280	101278	101281	101279	101281	101321	101321	101322	101321	101265	101269	101268	101330
17	101321	101321	101320	101279	101262	101319	101280	101321	101322	101321	101322	101262	101268	101270	101323
18	101322	101321	101278	101279	101322	101322	101283	101321	101322	101322	101320	101268	101278	101331	101328
19	101321	101321	101278	101261	101281	101322	101297	101320	101322	101322	101323	101261	101296	101334	101333
20	101320	101320	101280	101279	101254	101322	101277	101321	101321	101321	101330	101268	101269	101269	101343
21	101322	101320	101277	101278	101279	101276	101281	101320	101322	101321	101322	101262	101269	101271	101328
22	101320	101320	101279	101281	101322	101320	101281	101320	101321	101322	101322	101269	101268	101270	101326
23	101321	101321	101278	101284	101322	101322	101283	101320	101322	101321	101322	101269	101271	101322	101328
25	101320	101320	101351	101278	101322	101322	101295	101321	101322	101321	101322	101261	101261	101322	101324
30	101321	101321	101269	101262	101261	101339	101285	101321	101322	101321	101321	101274	101275	101270	101341
40	101320	101321	101278	101279	101323	101322	101282	101339	101322	101322	101320	101261	101268	101288	101345

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	101303 bytes	–	100%
1,000	101269 bytes	-34 bytes	100%
10,000	101256 bytes	-13 bytes	100%
100,000	101254 bytes	-2 bytes	1.16%
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)	101337 bytes	+83 bytes (+0.08%)	–
1	101350 bytes	+96 bytes (+0.09%)	+13 bytes
2	101392 bytes	+138 bytes (+0.14%)	+55 bytes
3	101462 bytes	+208 bytes (+0.21%)	+125 bytes
4	101494 bytes	+240 bytes (+0.24%)	+157 bytes
5	101477 bytes	+223 bytes (+0.22%)	+140 bytes
6	101477 bytes	+223 bytes (+0.22%)	+140 bytes
7	101418 bytes	+164 bytes (+0.16%)	+81 bytes
8	101395 bytes	+141 bytes (+0.14%)	+58 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	70713 bytes	-30541 bytes (-30.16%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	75193 bytes	-26061 bytes (-25.74%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	79534 bytes	-21720 bytes (-21.45%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	85541 bytes	-15713 bytes (-15.52%)
Brotli (Wikipedia)	brotli	brotli -q 11	88440 bytes	-12814 bytes (-12.66%)
LZMA2 (Wikipedia)	xz	xz -9	90568 bytes	-10686 bytes (-10.55%)
Zstandard (Wikipedia)	zstd	zstd -19	93316 bytes	-7938 bytes (-7.84%)

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.