Choose a version:
28% The original file has 264769 bytes (258.6k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 74667 bytes (72.9k, 28%).

After GZIP compression these minified files vary in size:
Boot
  29999 bytes (29.3k)
CDN
cdnjs
  25932 bytes (25.3k)
CDN
gzip -6 (default)
  25723 bytes (25.1k)
local copy
jsdelivr
  25642 bytes (25.0k)
CDN
unpkg
  25633 bytes (25.0k)
CDN
gzip -9
  25624 bytes (25.0k)
local copy
libdeflate -12
  24815 bytes (24.2k)
local copy
7zip -mx=9 -tgzip
  24810 bytes (24.2k)
local copy
kzip -s0 -rn -b4
  24769 bytes (24.2k)
local copy
pigz -11 -n
  24750 bytes (24.2k)
local copy
Zopfli
  24718 bytes (24.1k)
local copy
Zopfli (defluff)
  24717 bytes (24.1k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-1.0.20.min.js

You will automatically get the smallest Vue 1.0.20 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 915 bytes by using my Vue 1.0.20 Zopfli version instead of the best available CDN (3.70% smaller than unpkg, 24718 vs. 25633 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 --mls4 --bsr2 --lazy --ohh

(found April 10, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 4  --mls4
block splitting recursion 2  --bsr2
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 (24717 bytes).

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-1.0.20.min.js --location | md5sum
5ae4fd9c6a156ac319e776158eb381aa  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-1.0.20.min.zopfli.js.gz | md5sum
5ae4fd9c6a156ac319e776158eb381aa  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-1.0.20.min.js --location | sha1sum
8866dd8204655dc59e1913b053e6c61f206514ce  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-1.0.20.min.zopfli.js.gz | sha1sum
8866dd8204655dc59e1913b053e6c61f206514ce  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 29999 bytes 5ae4fd9c6a156ac319e776158eb381aa (invalid)
cdnjs 25932 bytes 5ae4fd9c6a156ac319e776158eb381aa (invalid)
jsdelivr 25642 bytes 5ae4fd9c6a156ac319e776158eb381aa (invalid)
unpkg 25633 bytes 5ae4fd9c6a156ac319e776158eb381aa April 6, 2017 @ 17:24

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

Other Versions

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

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
24718 bytes -1 byte zopfli --i100000 --mls4 --bsr2 --lazy --ohh April 10, 2017 @ 15:55
24719 bytes -1 byte zopfli --i10000 --mls4 --bsr2 --lazy --ohh April 7, 2017 @ 01:53
24720 bytes -1 byte zopfli --i10000 --mls8 --bsr20 --lazy --ohh April 7, 2017 @ 01:50
24721 bytes -1 byte zopfli --i10000 --mls16 --bsr25 --lazy --ohh April 7, 2017 @ 01:32
24722 bytes -1 byte zopfli --i1000 --mls8 --bsr20 --lazy --ohh April 6, 2017 @ 19:21
24723 bytes -5 bytes zopfli --i1000 --mls2 --bsr2 --lazy --ohh April 6, 2017 @ 19:00
24728 bytes zopfli --i100 --mls16 --bsr8 --lazy --ohh April 6, 2017 @ 18:30

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

Most recent activity on April 11, 2017 @ 10:46.

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
24720 24718 24726 24733 24722 24727 24726 24734 24734 24737 24735 24733 24728 24742 24738
24736 24735 24738 24730 24735 24722 24736 24736 24733 24732 24733 24734 24727 24734 24734
24736 24736 24724 24738 24737 24737 24736 24738 24737 24733 24734 24734 24727 24733 24734
24737 24737 24737 24737 24736 24736 24737 24732 24737 24737 24735 24737 24736 24737 24737
24736 24736 24721 24721 24736 24738 24736 24733 24737 24733 24733 24738 24732 24738 24734
24735 24736 24735 24736 24735 24735 24736 24739 24736 24733 24732 24736 24731 24734 24733
24736 24736 24737 24723 24735 24737 24736 24739 24736 24737 24736 24733 24723 24737 24737
24736 24736 24737 24736 24735 24737 24736 24738 24737 24733 24731 24734 24729 24738 24738
24735 24736 24737 24737 24736 24736 24736 24732 24736 24735 24734 24737 24727 24738 24734
24736 24736 24737 24736 24735 24737 24722 24732 24736 24733 24736 24737 24738 24741 24734
24720 24736 24728 24721 24735 24736 24725 24732 24736 24733 24733 24730 24725 24738 24733
24735 24736 24736 24739 24736 24737 24737 24733 24737 24737 24736 24736 24735 24735 24734
24736 24736 24735 24736 24735 24736 24734 24731 24736 24733 24736 24729 24740 24737 24733
24721 24728 24728 24722 24735 24735 24732 24738 24736 24733 24732 24734 24728 24738 24734
24721 24728 24737 24722 24735 24736 24736 24739 24731 24733 24734 24732 24730 24734 24734
24737 24735 24737 24736 24736 24736 24736 24732 24737 24738 24735 24736 24739 24734 24734
24720 24728 24720 24726 24736 24736 24737 24732 24736 24735 24735 24737 24739 24738 24733
24735 24736 24728 24722 24736 24736 24725 24739 24737 24733 24733 24731 24731 24734 24733
24735 24736 24738 24737 24736 24736 24736 24732 24737 24734 24736 24737 24738 24734 24734
24736 24735 24737 24736 24735 24737 24737 24731 24736 24732 24732 24737 24735 24737 24734
24719 24736 24727 24721 24738 24736 24736 24739 24741 24732 24734 24737 24733 24739 24733
24735 24735 24737 24736 24735 24737 24736 24732 24741 24733 24731 24731 24726 24734 24738
24737 24736 24727 24723 24738 24737 24739 24733 24736 24733 24736 24736 24739 24734 24735

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 24728 bytes 100%
1,000 24722 bytes -6 bytes 100%
10,000 24719 bytes -3 bytes 100%
100,000 24718 bytes -1 byte 2.32%
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
24794 bytes +76 bytes (+0.31%) +25 bytes
24794 bytes +76 bytes (+0.31%) +25 bytes
24782 bytes +64 bytes (+0.26%) +13 bytes
24787 bytes +69 bytes (+0.28%) +18 bytes
24769 bytes +51 bytes (+0.21%)
24810 bytes +92 bytes (+0.37%) +41 bytes
24837 bytes +119 bytes (+0.48%) +68 bytes
24864 bytes +146 bytes (+0.59%) +95 bytes
24896 bytes +178 bytes (+0.72%) +127 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
Algorithm Program Parameters Size Compared To Best Zopfli
ZPAQ (Wikipedia) zpaq zpaq -method 69 20532 bytes -4186 bytes (-16.94%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 20870 bytes -3848 bytes (-15.57%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 21749 bytes -2969 bytes (-12.01%)
Brotli (Wikipedia) brotli brotli -q 11 23101 bytes -1617 bytes (-6.54%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 23402 bytes -1316 bytes (-5.32%)
LZMA2 (Wikipedia) xz xz -9 23908 bytes -810 bytes (-3.28%)
ZSTD (Wikipedia) zstd zstd -19 24423 bytes -295 bytes (-1.19%)

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):


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 2018.
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