Vue 2.6.6 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 338203 bytes (330.3k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 93107 bytes (90.9k, 28%).

After GZIP compression these minified files vary in size:

unpkg	39634 bytes (38.7k)	CDN
Boot	38925 bytes (38.0k)	CDN
cdnjs	34074 bytes (33.3k)	CDN
gzip -6 (default)	33874 bytes (33.1k)	local copy
gzip -9	33806 bytes (33.0k)	local copy
libdeflate -12	32707 bytes (31.9k)	local copy
7zip -mx=9 -tgzip	32638 bytes (31.9k)	local copy
kzip -s0 -rn -b5	32599 bytes (31.8k)	local copy
zultra	32599 bytes (31.8k)	local copy
pigz -11 -n	32579 bytes (31.8k)	local copy
Zopfli	32545 bytes (31.8k)	local copy
Zopfli (defluff)	32544 bytes (31.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.6.6.min.js (or via HTTPS)

You will automatically get the smallest Vue 2.6.6 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

Save 1529 bytes by using my Vue 2.6.6 Zopfli version instead of the best available CDN (4.70% smaller than cdnjs, 32545 vs. 34074 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 --bsr8 --lazy --ohh

(found February 16, 2019)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	8	--mls8
block splitting recursion	8	--bsr8
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 (32544 bytes).

Download

Verify file integrity

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

MD5:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.6.6.min.js --location | md5sum
baa2f3e9801a1924119f400d8046e56a -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-2.6.6.min.zopfli.js.gz | md5sum
baa2f3e9801a1924119f400d8046e56a -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.6.6.min.js --location | sha1sum
691da5442d4259175b4fcece3bb49e88ddbfc4ee -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-2.6.6.min.zopfli.js.gz | sha1sum
691da5442d4259175b4fcece3bb49e88ddbfc4ee -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
unpkg	39634 bytes	baa2f3e9801a1924119f400d8046e56a	(invalid)
Boot	38925 bytes	baa2f3e9801a1924119f400d8046e56a	(invalid)
cdnjs	34074 bytes	baa2f3e9801a1924119f400d8046e56a	(invalid)

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

Other Versions

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

2.6.14, 2.6.13, 2.6.12, 2.6.11, 2.6.10, 2.6.9, 2.6.8, 2.6.7, 2.6.6, 2.6.5, 2.6.4, 2.6.3, 2.6.2, 2.6.1, 2.6.0, 2.5.22, 2.5.21, 2.5.20, 2.5.19, 2.5.18, 2.5.17, 2.5.16, 2.5.15, 2.5.14, 2.5.13, 2.5.12, 2.5.11, 2.5.10, 2.5.9, 2.5.8, 2.5.7, 2.5.6, 2.5.5, 2.5.4, 2.5.3, 2.5.2, 2.5.1, 2.5.0, 2.4.4, 2.4.3, 2.4.2, 2.4.1, 2.4.0, 2.3.4, 2.3.3, 2.3.2, 2.3.1, 2.3.0, 2.2.6, 2.2.5, 2.2.4, 2.2.3, 2.2.2, 2.2.1, 2.2.0, 2.1.10, 2.1.9, 2.1.8, 2.1.7, 2.1.6, 2.1.5, 2.1.4, 2.1.3, 2.1.2, 2.1.1, 2.1.0, 2.0.8, 2.0.7, 2.0.6, 2.0.5, 2.0.4, 2.0.3, 2.0.2, 2.0.1, 2.0.0,
1.0.28, 1.0.27, 1.0.26, 1.0.25, 1.0.24, 1.0.23, 1.0.22, 1.0.21, 1.0.20, 1.0.19, 1.0.18, 1.0.17, 1.0.16, 1.0.15, 1.0.14, 1.0.13, 1.0.12, 1.0.11, 1.0.10, 1.0.9,
0.10.6, 0.10.5, 0.10.4, 0.10.3, 0.10.2, 0.10.1, 0.10.0,
0.9.3, 0.9.2, 0.9.1, 0.9.0

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

Changelog

Best Zopfli parameters so far:

Size	Improvement	Parameters	Found
32545 bytes	-1 byte	zopfli --i1000000 --mls8 --bsr8 --lazy --ohh	February 16, 2019 @ 09:26
32546 bytes	-3 bytes	zopfli --i100000 --mls8 --bsr8 --lazy --ohh	February 16, 2019 @ 01:28
32549 bytes	-1 byte	zopfli --i10000 --mls8 --bsr8 --lazy --ohh	February 15, 2019 @ 08:19
32550 bytes	-1 byte	zopfli --i10000 --mls2 --bsr9 --lazy --ohh	February 14, 2019 @ 03:28
32551 bytes	-2 bytes	zopfli --i10000 --mls8 --bsr18 --lazy --ohh	February 14, 2019 @ 02:07
32553 bytes	-1 byte	zopfli --i10000 --mls8 --bsr10 --lazy --ohh	February 13, 2019 @ 22:48
32554 bytes	-2 bytes	zopfli --i1000 --mls2 --bsr9 --lazy --ohh	February 13, 2019 @ 15:07
32556 bytes	-3 bytes	zopfli --i1000 --mls8 --bsr8 --lazy --ohh	February 13, 2019 @ 15:06
32559 bytes	–	zopfli --i100 --mls8192 --bsr13 --lazy --ohh	February 13, 2019 @ 13:23

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 @ 13:06.

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	32563	32563	32564	32568	32574	32574	32569	32567	32579	32576	32557	32557	32558	32573	32581
4	32580	32562	32563	32562	32561	32576	32579	32581	32571	32579	32570	32567	32556	32570	32576
6	32562	32579	32588	32576	32592	32581	32561	32584	32583	32562	32567	32568	32556	32555	32578
7	32561	32562	32564	32564	32563	32580	32576	32581	32578	32579	32570	32566	32560	32568	32576
8	32563	32563	32545	32562	32563	32575	32563	32582	32580	32580	32562	32566	32556	32571	32579
9	32548	32563	32545	32571	32568	32565	32578	32580	32580	32571	32568	32568	32556	32570	32584
10	32566	32563	32553	32583	32561	32575	32581	32581	32582	32579	32570	32563	32555	32555	32576
11	32562	32562	32561	32561	32568	32579	32579	32581	32580	32575	32566	32557	32555	32573	32562
12	32562	32562	32563	32566	32567	32563	32563	32589	32593	32575	32565	32563	32555	32571	32577
13	32563	32563	32563	32593	32577	32570	32580	32580	32582	32585	32566	32564	32555	32558	32577
14	32580	32547	32553	32566	32577	32580	32593	32582	32571	32579	32569	32564	32554	32573	32578
15	32582	32563	32564	32595	32594	32581	32580	32581	32580	32579	32571	32563	32560	32567	32579
16	32562	32547	32563	32594	32579	32580	32587	32581	32580	32568	32564	32566	32560	32573	32577
17	32561	32563	32554	32595	32594	32564	32580	32581	32583	32579	32567	32565	32555	32570	32561
18	32562	32564	32551	32594	32561	32564	32579	32581	32588	32579	32566	32563	32560	32573	32578
19	32563	32564	32563	32571	32580	32580	32584	32581	32582	32581	32564	32566	32555	32571	32580
20	32563	32563	32576	32593	32578	32564	32591	32589	32582	32578	32570	32565	32555	32572	32580
21	32580	32579	32578	32595	32562	32578	32580	32580	32581	32579	32570	32566	32555	32570	32579
22	32562	32561	32562	32561	32576	32565	32581	32581	32582	32579	32571	32563	32555	32571	32579
23	32562	32560	32567	32578	32561	32564	32581	32581	32580	32584	32565	32565	32556	32571	32563
25	32580	32577	32554	32592	32580	32576	32592	32581	32582	32580	32570	32564	32560	32571	32576
30	32562	32561	32562	32569	32579	32580	32587	32581	32585	32578	32564	32563	32555	32571	32578
40	32561	32561	32553	32563	32560	32582	32580	32581	32582	32581	32566	32565	32555	32570	32579

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	32559 bytes	–	100%
1,000	32554 bytes	-5 bytes	100%
10,000	32549 bytes	-5 bytes	100%
100,000	32546 bytes	-3 bytes	1.45%
1,000,000	32545 bytes	-1 byte	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)	32653 bytes	+108 bytes (+0.33%)	+54 bytes
1	32660 bytes	+115 bytes (+0.35%)	+61 bytes
2	32662 bytes	+117 bytes (+0.36%)	+63 bytes
3	32650 bytes	+105 bytes (+0.32%)	+51 bytes
4	32657 bytes	+112 bytes (+0.34%)	+58 bytes
5	32599 bytes	+54 bytes (+0.17%)	–
6	32626 bytes	+81 bytes (+0.25%)	+27 bytes
7	32622 bytes	+77 bytes (+0.24%)	+23 bytes
8	32659 bytes	+114 bytes (+0.35%)	+60 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	26809 bytes	-5736 bytes (-17.62%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	27748 bytes	-4797 bytes (-14.74%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	28757 bytes	-3788 bytes (-11.64%)
Brotli (Wikipedia)	brotli	brotli -q 11	30499 bytes	-2046 bytes (-6.29%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	31117 bytes	-1428 bytes (-4.39%)
LZMA2 (Wikipedia)	xz	xz -9	31252 bytes	-1293 bytes (-3.97%)
Zstandard (Wikipedia)	zstd	zstd -19	31862 bytes	-683 bytes (-2.10%)

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.