Currently best Zopfli settings

Save 536 bytes by using my Vue 0.10.0 Zopfli version instead of the best available CDN (4.07% smaller than unpkg, 13175 vs. 13711 bytes):
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 --mls64 --bsr13 --lazy --ohh

(found April 10, 2017)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	64	--mls64
block splitting recursion	13	--bsr13
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-0.10.0.min.js --location | md5sum
df50760214ec7de176efe55019de7de3  -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-0.10.0.min.zopfli.js.gz | md5sum
df50760214ec7de176efe55019de7de3  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-0.10.0.min.js --location | sha1sum
1b4fad2842f0a101657467b44647460f02f6182a  -
curl --silent --compressed https://minime.stephan-brumme.com/files/vue/vue-0.10.0.min.zopfli.js.gz | sha1sum
1b4fad2842f0a101657467b44647460f02f6182a  -

All listed CDNs deliver identical contents:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	15926 bytes	df50760214ec7de176efe55019de7de3	(invalid)
cdnjs	13804 bytes	df50760214ec7de176efe55019de7de3	(invalid)
unpkg	13711 bytes	df50760214ec7de176efe55019de7de3	April 6, 2017 @ 17:25

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
13175 bytes	-1 byte	zopfli --i100000 --mls64 --bsr13 --lazy --ohh	April 10, 2017 @ 12:23
13176 bytes	-1 byte	zopfli --i10000 --mls64 --bsr13 --lazy --ohh	April 7, 2017 @ 05:58
13177 bytes	-2 bytes	zopfli --i1000 --mls64 --bsr10 --lazy --ohh	April 6, 2017 @ 18:58
13179 bytes	–	zopfli --i100 --mls64 --bsr12 --lazy --ohh	April 6, 2017 @ 18:03

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 @ 12:43.

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	13183	13179	13183	13179	13183	13182	13183	13185	13185	13185	13182	13183	13185	13193	13179
4	13186	13186	13183	13189	13188	13184	13185	13190	13184	13184	13180	13180	13191	13184	13186
6	13182	13182	13186	13183	13182	13181	13181	13179	13184	13184	13185	13192	13185	13179	13179
7	13183	13180	13184	13183	13179	13179	13179	13183	13182	13183	13179	13192	13191	13180	13185
8	13185	13185	13178	13179	13177	13183	13179	13182	13183	13182	13180	13190	13190	13179	13179
9	13183	13183	13180	13189	13181	13177	13179	13184	13183	13183	13179	13179	13191	13179	13180
10	13181	13180	13178	13183	13175	13175	13179	13180	13183	13184	13187	13182	13180	13182	13188
11	13180	13185	13178	13188	13180	13181	13179	13183	13182	13183	13181	13185	13191	13191	13190
12	13186	13177	13178	13179	13177	13175	13179	13183	13183	13183	13185	13190	13181	13190	13191
13	13183	13178	13178	13179	13175	13175	13179	13177	13182	13183	13184	13186	13191	13179	13191
14	13183	13183	13179	13180	13177	13177	13182	13180	13183	13183	13182	13179	13181	13191	13193
15	13181	13177	13178	13179	13183	13179	13179	13184	13183	13183	13185	13179	13191	13179	13179
16	13182	13178	13180	13179	13183	13179	13183	13180	13184	13183	13180	13179	13191	13189	13180
17	13183	13183	13179	13176	13177	13177	13179	13183	13183	13183	13179	13179	13183	13191	13182
18	13183	13178	13177	13179	13175	13182	13179	13177	13183	13183	13180	13190	13189	13190	13182
19	13183	13186	13183	13179	13176	13177	13179	13182	13183	13183	13184	13190	13190	13190	13180
20	13183	13183	13185	13188	13177	13189	13179	13182	13183	13183	13185	13187	13186	13191	13185
21	13182	13182	13182	13179	13183	13175	13179	13179	13179	13181	13180	13190	13179	13191	13180
22	13183	13183	13188	13179	13183	13182	13179	13183	13183	13183	13185	13182	13183	13191	13190
23	13183	13178	13177	13179	13176	13183	13179	13183	13183	13181	13179	13190	13192	13191	13180
25	13183	13183	13187	13179	13183	13181	13179	13183	13183	13182	13179	13185	13188	13189	13180
30	13183	13183	13177	13179	13177	13175	13179	13180	13182	13183	13185	13190	13186	13181	13189
40	13183	13182	13177	13179	13179	13182	13179	13179	13183	13184	13185	13181	13181	13189	13190

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	13179 bytes	–	100%
1,000	13177 bytes	-2 bytes	100%
10,000	13176 bytes	-1 byte	100%
100,000	13175 bytes	-1 byte	3.19%
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)	13223 bytes	+48 bytes (+0.36%)	+6 bytes
1	13222 bytes	+47 bytes (+0.36%)	+5 bytes
2	13220 bytes	+45 bytes (+0.34%)	+3 bytes
3	13217 bytes	+42 bytes (+0.32%)	–
4	13259 bytes	+84 bytes (+0.64%)	+42 bytes
5	13240 bytes	+65 bytes (+0.49%)	+23 bytes
6	13277 bytes	+102 bytes (+0.77%)	+60 bytes
7	13303 bytes	+128 bytes (+0.97%)	+86 bytes
8	13351 bytes	+176 bytes (+1.34%)	+134 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
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	11228 bytes	-1947 bytes (-14.78%)
ZPAQ (Wikipedia)	zpaq	zpaq -method 69	11565 bytes	-1610 bytes (-12.22%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	11939 bytes	-1236 bytes (-9.38%)
Brotli (Wikipedia)	brotli	brotli -q 11	12463 bytes	-712 bytes (-5.40%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	12682 bytes	-493 bytes (-3.74%)
LZMA2 (Wikipedia)	xz	xz -9	13120 bytes	-55 bytes (-0.42%)
Zstandard (Wikipedia)	zstd	zstd -19	13217 bytes	+42 bytes (+0.32%)

Detailled Analysis