Dojo 1.11.6 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 633440 bytes (618.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 165865 bytes (162.0k, 26%).

After GZIP compression these minified files vary in size:

gzip -6 (default)	55940 bytes (54.6k)	local copy
gzip -9	55892 bytes (54.6k)	local copy
libdeflate -12	53242 bytes (52.0k)	local copy
7zip -mx=9 -tgzip	53221 bytes (52.0k)	local copy
pigz -11 -n	53149 bytes (51.9k)	local copy
zultra	53144 bytes (51.9k)	local copy
kzip -s0 -rn -b1	53143 bytes (51.9k)	local copy
Zopfli	53049 bytes (51.8k)	local copy
Zopfli (defluff)	53047 bytes (51.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/dojo/dojo-1.11.6.min.js (or via HTTPS)

You will automatically get the smallest Dojo 1.11.6 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

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 --mls4 --bsr25 --lazy --ohh

(found March 5, 2022)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	4	--mls4
block splitting recursion	25	--bsr25
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 (53047 bytes).

Download

Verify file integrity

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

MD5:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.6/dojo.js --location | md5sum
2a46d2e4d20c9a723d0c6f468666965f -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.6.min.zopfli.js.gz | md5sum
2a46d2e4d20c9a723d0c6f468666965f -

SHA1:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.6/dojo.js --location | sha1sum
25c0c3952bd51e2220db199a4e844ae340ebfa34 -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.6.min.zopfli.js.gz | sha1sum
25c0c3952bd51e2220db199a4e844ae340ebfa34 -

Other Versions

Available Dojo versions at minime.stephan-brumme.com:

1.17.3, 1.17.2, 1.17.1, 1.17.0,
1.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1, 1.16.0,
1.15.6, 1.15.5, 1.15.4, 1.15.3, 1.15.2, 1.15.1, 1.15.0,
1.14.9, 1.14.8, 1.14.7, 1.14.6, 1.14.5, 1.14.4, 1.14.3, 1.14.2, 1.14.1, 1.14.0,
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,
1.12.11, 1.12.10, 1.12.9, 1.12.8, 1.12.7, 1.12.6, 1.12.5, 1.12.4, 1.12.3, 1.12.2, 1.12.1,
1.11.13, 1.11.12, 1.11.11, 1.11.10, 1.11.9, 1.11.8, 1.11.7, 1.11.6, 1.11.5, 1.11.4, 1.11.3, 1.11.2, 1.11.1, 1.11.0,
1.10.10, 1.10.9, 1.10.8, 1.10.7, 1.10.6, 1.10.5, 1.10.4, 1.10.3, 1.10.2, 1.10.1, 1.10.0,
1.9.11, 1.9.10, 1.9.9, 1.9.8, 1.9.7, 1.9.6, 1.9.5, 1.9.4, 1.9.3, 1.9.2, 1.9.1, 1.9.0,
1.8.14, 1.8.13, 1.8.12, 1.8.11, 1.8.10, 1.8.9, 1.8.8, 1.8.7, 1.8.6, 1.8.5, 1.8.4, 1.8.3, 1.8.2, 1.8.1, 1.8.0,
1.7.12, 1.7.11, 1.7.10, 1.7.9, 1.7.8, 1.7.7, 1.7.6, 1.7.5, 1.7.4, 1.7.3, 1.7.2, 1.7.1, 1.7.0,
1.6.5, 1.6.4, 1.6.3, 1.6.2, 1.6.1, 1.6.0,
1.5.6, 1.5.5, 1.5.4, 1.5.3, 1.5.2, 1.5.1, 1.5.0,
1.4.8, 1.4.7, 1.4.6, 1.4.5, 1.4.4, 1.4.3, 1.4.2, 1.4.1, 1.4.0,
1.3.3, 1.3.2, 1.3.1, 1.3.0,
1.2.3, 1.2.2

The project site contains an overview how well these versions were compressed.
Other interesting projects are AngularJS, BackboneJS, Bootstrap, D3, Ember, jQuery, Knockout, lodash, React, Socket.IO, ThreeJS, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:

Size	Improvement	Parameters	Found
53049 bytes	-1 byte	zopfli --i1000000 --mls4 --bsr25 --lazy --ohh	March 5, 2022 @ 04:10
53050 bytes	-2 bytes	zopfli --i1000000 --mls128 --bsr7 --lazy --ohh	October 5, 2018 @ 04:35
53052 bytes	-5 bytes	zopfli --i100000 --mls128 --bsr7 --lazy --ohh	October 4, 2018 @ 12:15
53057 bytes	-1 byte	zopfli --i10000 --mls128 --bsr7 --lazy --ohh	October 3, 2018 @ 17:46
53058 bytes	-1 byte	zopfli --i10000 --mls4 --bsr25 --lazy --ohh	October 3, 2018 @ 13:25
53059 bytes	-5 bytes	zopfli --i10000 --mls4 --bsr11 --lazy --ohh	October 3, 2018 @ 12:59
53064 bytes	-1 byte	zopfli --i1000 --mls16 --bsr40 --lazy --ohh	October 3, 2018 @ 09:50
53065 bytes	-1 byte	zopfli --i1000 --mls8 --bsr10 --lazy --ohh	October 3, 2018 @ 09:44
53066 bytes	–	zopfli --i100 --mls8 --bsr14 --lazy --ohh	October 2, 2018 @ 11:25

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

Most recent activity on March 9, 2022 @ 18:25.

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	53063	53062	53064	53063	53065	53064	53065	53063	53065	53063	53072	53064	53075	53091	53089
4	53080	53061	53062	53063	53071	53072	53060	53062	53066	53071	53073	53064	53072	53076	53071
6	53094	53062	53063	53064	53068	53062	53061	53064	53068	53083	53081	53072	53074	53074	53070
7	53093	53060	53065	53100	53060	53059	53050	53065	53069	53063	53082	53066	53078	53083	53076
8	53060	53059	53060	53063	53063	53081	53060	53061	53068	53075	53073	53062	53075	53075	53079
9	53062	53051	53062	53062	53065	53076	53050	53063	53067	53082	53071	53062	53071	53072	53073
10	53091	53059	53053	53101	53076	53053	53077	53061	53068	53072	53083	53064	53079	53074	53078
11	53099	53059	53060	53063	53066	53062	53052	53060	53068	53071	53067	53070	53072	53081	53074
12	53096	53061	53060	53062	53064	53064	53049	53060	53068	53072	53063	53072	53070	53074	53075
13	53062	53062	53062	53061	53064	53075	53050	53061	53068	53071	53075	53062	53072	53074	53078
14	53060	53060	53051	53063	53066	53064	53050	53063	53069	53073	53086	53071	53072	53073	53069
15	53094	53051	53059	53062	53062	53065	53051	53069	53069	53073	53085	53063	53075	53082	53070
16	53062	53059	53060	53060	53060	53070	53060	53070	53070	53071	53067	53063	53070	53074	53074
17	53060	53060	53063	53060	53061	53062	53060	53068	53069	53084	53082	53062	53075	53074	53071
18	53098	53051	53060	53062	53061	53063	53050	53068	53069	53073	53082	53070	53070	53078	53078
19	53098	53053	53063	53061	53076	53075	53050	53062	53067	53071	53070	53066	53072	53074	53074
20	53100	53059	53061	53062	53074	53062	53059	53068	53069	53073	53068	53070	53073	53073	53074
21	53096	53051	53062	53061	53061	53061	53050	53062	53068	53084	53071	53064	53073	53074	53073
22	53090	53052	53061	53062	53065	53059	53050	53068	53069	53071	53067	53062	53071	53085	53074
23	53096	53060	53060	53061	53061	53064	53060	53068	53068	53072	53071	53064	53071	53081	53073
25	53097	53049	53063	53062	53061	53063	53060	53067	53068	53083	53067	53066	53077	53087	53073
30	53091	53051	53063	53062	53065	53079	53060	53062	53069	53071	53070	53063	53072	53082	53069
40	53091	53051	53050	53060	53061	53063	53059	53067	53069	53071	53085	53071	53079	53073	53072

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	53066 bytes	–	100%
1,000	53064 bytes	-2 bytes	100%
10,000	53057 bytes	-7 bytes	100%
100,000	53051 bytes	-6 bytes	6.96%
1,000,000	53049 bytes	-2 bytes	5.80%
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)	53189 bytes	+140 bytes (+0.26%)	+46 bytes
1	53143 bytes	+94 bytes (+0.18%)	–
2	53146 bytes	+97 bytes (+0.18%)	+3 bytes
3	53181 bytes	+132 bytes (+0.25%)	+38 bytes
4	53189 bytes	+140 bytes (+0.26%)	+46 bytes
5	53238 bytes	+189 bytes (+0.36%)	+95 bytes
6	53294 bytes	+245 bytes (+0.46%)	+151 bytes
7	53317 bytes	+268 bytes (+0.51%)	+174 bytes
8	53333 bytes	+284 bytes (+0.54%)	+190 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	38987 bytes	-14062 bytes (-26.51%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	46542 bytes	-6507 bytes (-12.27%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	47418 bytes	-5631 bytes (-10.61%)
Brotli (Wikipedia)	brotli	brotli -q 11	48956 bytes	-4093 bytes (-7.72%)
LZMA2 (Wikipedia)	xz	xz -9	50068 bytes	-2981 bytes (-5.62%)
Zstandard (Wikipedia)	zstd	zstd -19	51473 bytes	-1576 bytes (-2.97%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	51775 bytes	-1274 bytes (-2.40%)

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 2026.
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.