Vue 2.5.18 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 311500 bytes (304.2k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 87745 bytes (85.7k, 28%).

After GZIP compression these minified files vary in size:

Boot	31977 bytes (31.2k)	CDN
cdnjs	31977 bytes (31.2k)	CDN
gzip -6 (default)	31740 bytes (31.0k)	local copy
gzip -9	31676 bytes (30.9k)	local copy
unpkg	31671 bytes (30.9k)	CDN
kzip -s0 -rn -b1	30634 bytes (29.9k)	local copy
7zip -mx=9 -tgzip	30617 bytes (29.9k)	local copy
zultra	30594 bytes (29.9k)	local copy
libdeflate -12	30589 bytes (29.9k)	local copy
pigz -11 -n	30562 bytes (29.8k)	local copy
Zopfli	30521 bytes (29.8k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.5.18.min.js (or via HTTPS)

You will automatically get the smallest Vue 2.5.18 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 1150 bytes by using my Vue 2.5.18 Zopfli version instead of the best available CDN (3.77% smaller than unpkg, 30521 vs. 31671 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 --mls64 --bsr11 --lazy --ohh

(found December 12, 2018)

Description	Value	Parameter
iterations	1000000	--i1000000
maximum blocks	8	--mb8
maximum length score	64	--mls64
block splitting recursion	11	--bsr11
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

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-2.5.18.min.js --location | md5sum
7c3f9a69d7c03e619f3e1586a325e5d7 -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-2.5.18.min.zopfli.js.gz | md5sum
7c3f9a69d7c03e619f3e1586a325e5d7 -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.5.18.min.js --location | sha1sum
ed63184f684302a9656d23819cd9f3ab8ba9b9d2 -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-2.5.18.min.zopfli.js.gz | sha1sum
ed63184f684302a9656d23819cd9f3ab8ba9b9d2 -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	31977 bytes	7c3f9a69d7c03e619f3e1586a325e5d7	(invalid)
cdnjs	31977 bytes	7c3f9a69d7c03e619f3e1586a325e5d7	(invalid)
unpkg	31671 bytes	7c3f9a69d7c03e619f3e1586a325e5d7	(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
30521 bytes	-3 bytes	zopfli --i1000000 --mls64 --bsr11 --lazy --ohh	December 12, 2018 @ 19:14
30524 bytes	-3 bytes	zopfli --i100000 --mls64 --bsr11 --lazy --ohh	December 12, 2018 @ 15:43
30527 bytes	-1 byte	zopfli --i10000 --mls64 --bsr11 --lazy --ohh	December 12, 2018 @ 12:51
30528 bytes	-4 bytes	zopfli --i1000 --mls64 --bsr11 --lazy --ohh	December 12, 2018 @ 12:32
30532 bytes	-7 bytes	zopfli --i1000 --mls64 --bsr10 --lazy --ohh	December 12, 2018 @ 12:32
30539 bytes	–	zopfli --i100 --mls64 --bsr13 --lazy --ohh	December 12, 2018 @ 11:39

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 @ 12:55.

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	30564	30554	30553	30559	30554	30555	30555	30557	30554	30555	30562	30554	30565	30568	30551
4	30560	30560	30562	30561	30562	30561	30564	30556	30557	30555	30553	30554	30568	30565	30555
6	30555	30550	30554	30555	30555	30557	30555	30553	30554	30552	30561	30567	30566	30550	30560
7	30554	30549	30554	30552	30547	30553	30557	30557	30552	30551	30551	30550	30548	30554	30549
8	30553	30548	30550	30552	30553	30554	30555	30553	30550	30551	30551	30550	30551	30568	30551
9	30555	30547	30548	30554	30547	30547	30555	30554	30555	30552	30552	30566	30566	30564	30553
10	30549	30552	30555	30530	30525	30530	30538	30552	30554	30553	30553	30548	30551	30554	30553
11	30556	30552	30547	30548	30548	30521	30554	30556	30554	30552	30552	30566	30566	30567	30552
12	30548	30549	30547	30546	30548	30548	30555	30556	30555	30552	30551	30569	30566	30553	30551
13	30554	30548	30548	30553	30548	30525	30556	30554	30553	30552	30552	30569	30547	30554	30550
14	30549	30551	30547	30550	30554	30550	30556	30553	30555	30553	30552	30550	30549	30566	30551
15	30554	30548	30554	30559	30548	30553	30531	30553	30555	30552	30553	30565	30551	30558	30552
16	30552	30548	30547	30551	30549	30554	30555	30554	30554	30553	30561	30549	30549	30557	30550
17	30553	30547	30548	30547	30548	30550	30552	30553	30549	30552	30561	30567	30546	30564	30552
18	30550	30548	30547	30550	30547	30548	30554	30556	30550	30552	30551	30549	30546	30562	30550
19	30548	30550	30557	30549	30547	30548	30552	30552	30554	30552	30551	30565	30549	30561	30551
20	30550	30549	30549	30547	30548	30548	30554	30554	30552	30552	30551	30552	30546	30552	30552
21	30554	30550	30554	30547	30546	30548	30554	30554	30553	30552	30551	30567	30551	30555	30550
22	30551	30548	30545	30552	30555	30549	30556	30553	30553	30553	30551	30567	30546	30568	30550
23	30553	30550	30552	30548	30548	30549	30554	30555	30554	30553	30552	30549	30551	30554	30553
25	30552	30549	30549	30547	30548	30548	30555	30553	30556	30552	30553	30549	30547	30554	30552
30	30555	30550	30550	30551	30546	30547	30554	30552	30555	30552	30551	30550	30548	30555	30552
40	30553	30548	30548	30550	30555	30548	30555	30553	30553	30552	30566	30569	30566	30564	30551

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	30539 bytes	–	100%
1,000	30528 bytes	-11 bytes	100%
10,000	30527 bytes	-1 byte	100%
100,000	30524 bytes	-3 bytes	0.87%
1,000,000	30521 bytes	-3 bytes	0.29%
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)	30634 bytes	+113 bytes (+0.37%)	–
1	30634 bytes	+113 bytes (+0.37%)	–
2	30641 bytes	+120 bytes (+0.39%)	+7 bytes
3	30644 bytes	+123 bytes (+0.40%)	+10 bytes
4	30671 bytes	+150 bytes (+0.49%)	+37 bytes
5	30686 bytes	+165 bytes (+0.54%)	+52 bytes
6	30687 bytes	+166 bytes (+0.54%)	+53 bytes
7	30642 bytes	+121 bytes (+0.40%)	+8 bytes
8	30668 bytes	+147 bytes (+0.48%)	+34 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	25318 bytes	-5203 bytes (-17.05%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	26156 bytes	-4365 bytes (-14.30%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	27099 bytes	-3422 bytes (-11.21%)
Brotli (Wikipedia)	brotli	brotli -q 11	28698 bytes	-1823 bytes (-5.97%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	29323 bytes	-1198 bytes (-3.93%)
LZMA2 (Wikipedia)	xz	xz -9	29488 bytes	-1033 bytes (-3.38%)
Zstandard (Wikipedia)	zstd	zstd -19	30103 bytes	-418 bytes (-1.37%)

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.