D3 4.12.2 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 471591 bytes (460.5k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 221645 bytes (216.5k, 47%).

After GZIP compression these minified files vary in size:

Boot	84737 bytes (82.8k)	CDN
cdnjs	74655 bytes (72.9k)	CDN
gzip -6 (default)	74090 bytes (72.4k)	local copy
gzip -9	73838 bytes (72.1k)	local copy
libdeflate -12	70801 bytes (69.1k)	local copy
7zip -mx=9 -tgzip	70605 bytes (69.0k)	local copy
zultra	70306 bytes (68.7k)	local copy
pigz -11 -n	70193 bytes (68.5k)	local copy
kzip -s0 -rn -b0	70103 bytes (68.5k)	local copy
Zopfli	70060 bytes (68.4k)	local copy
Zopfli (defluff)	70057 bytes (68.4k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/d3/d3-4.12.2.min.js (or via HTTPS)

You will automatically get the smallest D3 4.12.2 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 4595 bytes by using my D3 4.12.2 Zopfli version instead of the best available CDN (6.56% smaller than cdnjs, 70060 vs. 74655 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 --mls8192 --bsr10 --lazy --ohh

(found December 30, 2017)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	8192	--mls8192
block splitting recursion	10	--bsr10
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 (70057 bytes).

Download

Verify file integrity

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

MD5:
curl --silent --compressed https://raw.githubusercontent.com/mbostock/d3/v4.12.2/d3.zip --location | md5sum
00ac35990f33fad3241b98d0914f8fd2 -
curl --silent --compressed https://minime.stephan-brumme.com/files/d3/d3-4.12.2.min.zopfli.js.gz | md5sum
00ac35990f33fad3241b98d0914f8fd2 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mbostock/d3/v4.12.2/d3.zip --location | sha1sum
6220c3a2874fb95bd68a8fcfdf65b2236784bd86 -
curl --silent --compressed https://minime.stephan-brumme.com/files/d3/d3-4.12.2.min.zopfli.js.gz | sha1sum
6220c3a2874fb95bd68a8fcfdf65b2236784bd86 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	84737 bytes	00ac35990f33fad3241b98d0914f8fd2	January 1, 2018 @ 13:46
cdnjs	74655 bytes	00ac35990f33fad3241b98d0914f8fd2	December 26, 2017 @ 23:17

Note: only the MD5 hashes are shown to keep things simple.

Other Versions

Available D3 versions at minime.stephan-brumme.com:

6.7.0, 6.6.2, 6.6.1, 6.6.0, 6.5.0, 6.4.0, 6.3.1, 6.2.0, 6.1.1, 6.1.0, 6.0.0,
5.16.0, 5.15.1, 5.15.0, 5.14.2, 5.14.1, 5.14.0, 5.13.1, 5.13.0, 5.12.0, 5.11.0, 5.10.1, 5.10.0,
5.9.7, 5.9.6, 5.9.5, 5.9.4, 5.9.3, 5.9.2, 5.9.1, 5.9.0, 5.8.2, 5.8.1, 5.8.0, 5.7.0, 5.6.0, 5.5.0, 5.4.0, 5.3.0, 5.2.0, 5.1.0, 5.0.1, 5.0.0,
4.13.0, 4.12.2, 4.12.1, 4.12.0, 4.11.0, 4.10.2, 4.10.1, 4.10.0,
4.9.1, 4.9.0, 4.8.0, 4.7.4, 4.7.3, 4.7.2, 4.7.1, 4.7.0, 4.6.0, 4.5.0, 4.4.4, 4.4.3, 4.4.2, 4.4.1, 4.4.0, 4.3.0, 4.2.8, 4.2.7, 4.2.6, 4.2.5, 4.2.4, 4.2.3, 4.2.2, 4.2.1, 4.2.0, 4.1.1, 4.1.0, 4.0.0,
3.5.17, 3.5.16, 3.5.15, 3.5.14, 3.5.13, 3.5.12, 3.5.11, 3.5.10, 3.5.9, 3.5.8, 3.5.7, 3.5.6, 3.5.5, 3.5.4, 3.5.3, 3.5.2, 3.5.1, 3.5.0, 3.4.13, 3.4.12, 3.4.11, 3.4.10, 3.4.9, 3.4.8, 3.4.6, 3.4.5, 3.4.4, 3.4.3, 3.4.2, 3.4.1, 3.4.0, 3.3.13, 3.3.12, 3.3.11, 3.3.10, 3.3.9, 3.3.8, 3.3.7, 3.3.6, 3.3.5, 3.3.4, 3.3.3, 3.3.2, 3.3.1, 3.3.0, 3.2.8, 3.2.7, 3.2.6, 3.2.5, 3.2.4, 3.2.3, 3.2.2, 3.2.1, 3.2.0, 3.1.10, 3.1.9, 3.1.8, 3.1.7, 3.1.6, 3.1.5, 3.1.4, 3.1.3, 3.1.2, 3.1.1, 3.1.0, 3.0.8, 3.0.7, 3.0.6, 3.0.5, 3.0.4, 3.0.3, 3.0.2, 3.0.1, 3.0.0

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

Changelog

Best Zopfli parameters so far:

Size	Improvement	Parameters	Found
70060 bytes	-6 bytes	zopfli --i1000000 --mls8192 --bsr10 --lazy --ohh	December 30, 2017 @ 01:52
70066 bytes	-4 bytes	zopfli --i100000 --mls8192 --bsr9 --lazy --ohh	December 29, 2017 @ 16:14
70070 bytes	-1 byte	zopfli --i10000 --mls16384 --bsr21 --lazy --ohh	December 29, 2017 @ 01:07
70071 bytes	-5 bytes	zopfli --i10000 --mls8192 --bsr9 --lazy --ohh	December 28, 2017 @ 21:30
70076 bytes	-4 bytes	zopfli --i10000 --mls8192 --bsr6 --lazy --ohh	December 28, 2017 @ 21:16
70080 bytes	-2 bytes	zopfli --i10000 --mls4 --bsr16 --lazy --ohh	December 28, 2017 @ 21:10
70082 bytes	-11 bytes	zopfli --i1000 --mls8192 --bsr9 --lazy --ohh	December 28, 2017 @ 15:51
70093 bytes	–	zopfli --i100 --mls16384 --bsr21 --lazy --ohh	December 28, 2017 @ 15:08

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 @ 12:51.

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	70428	70421	70350	70333	70346	70341	70348	70340	70320	70235	70196	70208	70222	70213	70332
4	70118	70124	70215	70201	70217	70193	70215	70209	70194	70154	70153	70101	70099	70136	70122
6	70099	70106	70137	70120	70128	70143	70109	70111	70131	70166	70084	70110	70076	70091	70119
7	70183	70140	70118	70118	70116	70115	70098	70108	70103	70110	70212	70101	70129	70110	70147
8	70168	70171	70136	70139	70157	70102	70105	70256	70265	70322	70131	70141	70280	70148	70232
9	70079	70109	70116	70159	70094	70102	70117	70085	70131	70129	70098	70167	70062	70089	70247
10	70109	70085	70115	70125	70109	70103	70107	70085	70102	70100	70110	70100	70060	70083	70109
11	70097	70102	70151	70128	70146	70206	70114	70267	70124	70266	70112	70102	70125	70085	70138
12	70114	70106	70124	70101	70108	70110	70110	70109	70121	70090	70092	70135	70103	70083	70163
13	70135	70147	70125	70148	70148	70109	70139	70136	70118	70101	70099	70130	70129	70099	70093
14	70113	70103	70117	70096	70096	70099	70102	70115	70119	70134	70114	70128	70136	70085	70112
15	70103	70103	70121	70091	70091	70101	70088	70096	70097	70092	70099	70129	70112	70092	70103
16	70128	70080	70147	70091	70092	70091	70089	70086	70094	70098	70112	70133	70104	70104	70095
17	70124	70145	70170	70136	70165	70161	70168	70162	70115	70119	70132	70101	70125	70085	70106
18	70128	70120	70117	70119	70089	70102	70095	70134	70132	70104	70146	70127	70120	70094	70100
19	70098	70105	70115	70114	70088	70099	70095	70105	70121	70142	70100	70123	70120	70108	70116
20	70102	70112	70110	70092	70098	70091	70099	70123	70109	70098	70091	70101	70134	70101	70078
21	70107	70100	70112	70121	70100	70099	70093	70095	70103	70106	70108	70145	70113	70067	70110
22	70142	70095	70149	70097	70095	70092	70093	70090	70145	70100	70110	70124	70109	70090	70093
23	70080	70099	70156	70141	70178	70099	70088	70196	70113	70121	70108	70108	70131	70102	70092
25	70108	70102	70118	70117	70091	70092	70095	70098	70123	70134	70105	70102	70109	70084	70096
30	70080	70083	70125	70114	70094	70085	70092	70092	70121	70098	70117	70123	70121	70082	70091
40	70115	70109	70114	70114	70100	70094	70093	70109	70097	70101	70096	70131	70111	70081	70107

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	70093 bytes	–	100%
1,000	70082 bytes	-11 bytes	100%
10,000	70070 bytes	-12 bytes	100%
100,000	70066 bytes	-4 bytes	0.87%
1,000,000	70060 bytes	-6 bytes	0.58%
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)	70103 bytes	+43 bytes (+0.06%)	–
1	71516 bytes	+1456 bytes (+2.08%)	+1413 bytes
2	71369 bytes	+1309 bytes (+1.87%)	+1266 bytes
3	71095 bytes	+1035 bytes (+1.48%)	+992 bytes
4	70281 bytes	+221 bytes (+0.32%)	+178 bytes
5	70115 bytes	+55 bytes (+0.08%)	+12 bytes
6	70109 bytes	+49 bytes (+0.07%)	+6 bytes
7	70116 bytes	+56 bytes (+0.08%)	+13 bytes
8	70121 bytes	+61 bytes (+0.09%)	+18 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	54751 bytes	-15309 bytes (-21.85%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	60556 bytes	-9504 bytes (-13.57%)
LZMA2 (Wikipedia)	xz	xz -9	61912 bytes	-8148 bytes (-11.63%)
Brotli (Wikipedia)	brotli	brotli -q 11	62089 bytes	-7971 bytes (-11.38%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	62957 bytes	-7103 bytes (-10.14%)
Zstandard (Wikipedia)	zstd	zstd -19	67303 bytes	-2757 bytes (-3.94%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	68091 bytes	-1969 bytes (-2.81%)

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.