Choose a version:
31% The original file has 284067 bytes (277.4k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 86676 bytes (84.6k, 31%).

After GZIP compression these minified files vary in size:
Boot
  36251 bytes (35.4k)
CDN
cdnjs
  31887 bytes (31.1k)
CDN
gzip -6 (default)
  31709 bytes (31.0k)
local copy
unpkg
  31681 bytes (30.9k)
CDN
gzip -9
  31651 bytes (30.9k)
local copy
libdeflate -12
  30682 bytes (30.0k)
local copy
7zip -mx=9 -tgzip
  30637 bytes (29.9k)
local copy
kzip -s0 -rn -b3
  30623 bytes (29.9k)
local copy
pigz -11 -n
  30580 bytes (29.9k)
local copy
Zopfli
  30547 bytes (29.8k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.5.9.min.js

You will automatically get the smallest Vue 2.5.9 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 1134 bytes by using my Vue 2.5.9 Zopfli version instead of the best available CDN (3.71% smaller than unpkg, 30547 vs. 31681 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 --i1000000 --mb8 --mls1024 --bsr11 --lazy --ohh

(found November 28, 2017)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 1024  --mls1024
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-2.5.9.min.js --location | md5sum
915c889a16e40bffd3ba95936f97c057  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.5.9.min.zopfli.js.gz | md5sum
915c889a16e40bffd3ba95936f97c057  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.5.9.min.js --location | sha1sum
bcca7a4e80760d5d97086284da822ea46cdfd18f  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.5.9.min.zopfli.js.gz | sha1sum
bcca7a4e80760d5d97086284da822ea46cdfd18f  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 36251 bytes 915c889a16e40bffd3ba95936f97c057 (invalid)
cdnjs 31887 bytes 915c889a16e40bffd3ba95936f97c057 (invalid)
unpkg 31681 bytes 915c889a16e40bffd3ba95936f97c057 (invalid)

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

Other Versions

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

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
30547 bytes -2 bytes zopfli --i1000000 --mls1024 --bsr11 --lazy --ohh November 28, 2017 @ 21:54
30549 bytes -1 byte zopfli --i100000 --mls1024 --bsr11 --lazy --ohh November 28, 2017 @ 14:18
30550 bytes -1 byte zopfli --i100000 --mls4 --bsr20 --lazy --ohh November 28, 2017 @ 13:49
30551 bytes -5 bytes zopfli --i10000 --mls4 --bsr20 --lazy --ohh November 28, 2017 @ 13:17
30556 bytes -2 bytes zopfli --i1000 --mls4 --bsr20 --lazy --ohh November 28, 2017 @ 12:37
30558 bytes -2 bytes zopfli --i1000 --mls16384 --bsr6 --lazy --ohh November 28, 2017 @ 12:35
30560 bytes -2 bytes zopfli --i1000 --mls32 --bsr7 --lazy --ohh November 28, 2017 @ 12:34
30562 bytes zopfli --i100 --mls1024 --bsr19 --lazy --ohh November 28, 2017 @ 11:59

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

Most recent activity on November 29, 2017 @ 01:00.

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
30584 30583 30572 30574 30577 30574 30577 30559 30577 30558 30560 30578 30577 30560 30563
30559 30555 30560 30559 30555 30560 30553 30578 30578 30555 30578 30575 30561 30570 30559
30555 30567 30555 30554 30559 30555 30557 30558 30559 30558 30556 30575 30566 30547 30568
30568 30556 30573 30572 30554 30554 30557 30554 30555 30559 30554 30559 30567 30555 30555
30559 30579 30577 30578 30554 30554 30556 30558 30562 30558 30554 30557 30567 30555 30557
30568 30572 30572 30573 30555 30555 30575 30578 30559 30558 30553 30559 30562 30555 30555
30555 30560 30573 30555 30555 30555 30556 30558 30560 30555 30557 30557 30568 30555 30555
30554 30560 30559 30554 30555 30555 30557 30554 30559 30547 30554 30557 30567 30554 30556
30555 30560 30553 30556 30556 30571 30558 30555 30559 30560 30554 30559 30565 30555 30557
30555 30558 30555 30556 30556 30557 30557 30554 30554 30558 30553 30558 30562 30555 30562
30557 30560 30560 30566 30576 30557 30557 30558 30558 30560 30554 30559 30563 30558 30556
30555 30575 30555 30555 30554 30557 30555 30554 30558 30556 30554 30559 30562 30560 30556
30560 30560 30557 30554 30555 30555 30555 30558 30555 30561 30559 30557 30558 30566 30566
30554 30558 30558 30555 30555 30555 30554 30554 30560 30557 30554 30558 30560 30555 30557
30571 30572 30572 30574 30568 30555 30554 30554 30559 30559 30554 30559 30557 30558 30557
30567 30572 30557 30573 30557 30555 30557 30558 30555 30554 30577 30558 30566 30559 30567
30562 30550 30563 30556 30553 30557 30558 30559 30554 30554 30554 30557 30566 30556 30567
30555 30557 30559 30555 30558 30557 30560 30556 30561 30559 30555 30559 30559 30558 30557
30555 30579 30560 30555 30556 30557 30561 30553 30555 30562 30554 30558 30559 30559 30556
30555 30560 30559 30554 30556 30556 30558 30554 30554 30559 30554 30560 30560 30555 30555
30569 30572 30572 30552 30555 30556 30554 30557 30559 30558 30553 30558 30568 30559 30556
30555 30560 30555 30554 30556 30556 30559 30558 30559 30559 30555 30558 30559 30559 30556
30555 30555 30558 30555 30555 30555 30555 30553 30556 30556 30554 30556 30555 30555 30556

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 30562 bytes 100%
1,000 30556 bytes -6 bytes 100%
10,000 30551 bytes -5 bytes 100%
100,000 30549 bytes -2 bytes 0.87%
1,000,000 30547 bytes -2 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
30628 bytes +81 bytes (+0.27%) +5 bytes
30631 bytes +84 bytes (+0.27%) +8 bytes
30648 bytes +101 bytes (+0.33%) +25 bytes
30623 bytes +76 bytes (+0.25%)
30650 bytes +103 bytes (+0.34%) +27 bytes
30677 bytes +130 bytes (+0.43%) +54 bytes
30712 bytes +165 bytes (+0.54%) +89 bytes
30742 bytes +195 bytes (+0.64%) +119 bytes
30766 bytes +219 bytes (+0.72%) +143 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 24983 bytes -5564 bytes (-18.21%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 25868 bytes -4679 bytes (-15.32%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 26940 bytes -3607 bytes (-11.81%)
Brotli (Wikipedia) brotli brotli -q 11 28396 bytes -2151 bytes (-7.04%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 28959 bytes -1588 bytes (-5.20%)
LZMA2 (Wikipedia) xz xz -9 29180 bytes -1367 bytes (-4.48%)
ZSTD (Wikipedia) zstd zstd -19 29982 bytes -565 bytes (-1.85%)

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 2017.
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