Choose a version:
33% The original file has 216842 bytes (211.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 70873 bytes (69.2k, 33%).

After GZIP compression these minified files vary in size:
Boot
  29633 bytes (28.9k)
CDN, direct link
unpkg
  28762 bytes (28.1k)
CDN, direct link
cdnjs
  26076 bytes (25.5k)
CDN, direct link
gzip -6 (default)
  25933 bytes (25.3k)
local copy
gzip -9
  25912 bytes (25.3k)
local copy
jsdelivr
  25899 bytes (25.3k)
CDN, direct link
7zip -mx=9 -tgzip
  25061 bytes (24.5k)
local copy
kzip -s0 -rn -b1
  25057 bytes (24.5k)
local copy
libdeflate -12
  25047 bytes (24.5k)
local copy
pigz -11 -n
  25026 bytes (24.4k)
local copy
Zopfli
  24950 bytes (24.4k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.1.5.min.js

You will automatically get the smallest Vue 2.1.5 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 949 bytes by using my Vue 2.1.5 Zopfli version instead of the best available CDN (3.80% smaller than jsdelivr, 24950 vs. 25899 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 --mls256 --bsr8 --lazy --ohh

(found April 4, 2017)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 256  --mls256
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

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-2.1.5.min.js --location | md5sum
d1e5ee997f81d164a62f6782dd039aa5  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.1.5.min.zopfli.js.gz | md5sum
d1e5ee997f81d164a62f6782dd039aa5  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.1.5.min.js --location | sha1sum
30c8d892f35336e7d5068f78c27342f0fd94b392  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.1.5.min.zopfli.js.gz | sha1sum
30c8d892f35336e7d5068f78c27342f0fd94b392  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 29633 bytes d1e5ee997f81d164a62f6782dd039aa5 (invalid)
unpkg 28762 bytes d1e5ee997f81d164a62f6782dd039aa5 April 4, 2017 @ 10:09
cdnjs 26076 bytes d1e5ee997f81d164a62f6782dd039aa5 (invalid)
jsdelivr 25899 bytes d1e5ee997f81d164a62f6782dd039aa5 (invalid)

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

Other Versions

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

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
24950 bytes -2 bytes zopfli --i100000 --mls256 --bsr8 --lazy --ohh April 4, 2017 @ 14:49
24952 bytes -3 bytes zopfli --i10000 --mls256 --bsr8 --lazy --ohh April 4, 2017 @ 11:19
24955 bytes -1 byte zopfli --i1000 --mls256 --bsr8 --lazy --ohh April 4, 2017 @ 10:44
24956 bytes zopfli --i100 --mls256 --bsr8 --lazy --ohh April 4, 2017 @ 10:34

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 @ 11:34.

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
24984 24968 24970 24997 24967 24969 24966 24956 25002 25016 25015 25013 25010 25008 25013
24995 24994 25002 24989 24993 24995 24991 24991 24990 25009 25010 25013 25011 25013 25009
24989 24988 24989 24993 24986 24989 24992 24993 24990 25008 25009 25007 25007 25009 25008
24990 24996 24995 24995 24982 24999 24989 24991 24990 25008 25009 24994 25000 24997 25013
24983 24982 24971 24999 24957 24992 24978 24950 24963 25008 25009 25013 25011 24996 25007
24997 24990 24994 24996 24997 24976 24991 24991 24990 25010 24993 25013 24996 25012 25012
24981 24995 24989 24989 24984 24999 24991 24990 24995 25008 24987 24997 24993 25009 24999
24999 24993 24995 25001 24987 24993 24997 24999 24967 25010 24996 24997 25013 25009 24991
24990 24995 24989 24994 24991 24990 24982 24991 24990 24994 24996 25007 25013 24997 24997
24977 24978 24989 24985 24994 24979 24983 24990 24989 24996 24998 24999 24995 24998 24998
24994 24981 24992 25002 24993 24992 24988 24992 24991 25000 24997 24992 25001 24992 25000
24986 24990 24989 24996 24982 24980 24983 24992 24991 25010 24992 24991 24993 24991 24996
24995 24987 24992 24986 24968 24982 24998 24991 24966 25010 24996 24990 24986 24992 24996
24988 24981 24992 24990 24986 24980 24982 24988 24988 25010 24996 25007 24990 25008 24996
24989 24994 24991 24995 24988 24981 24983 24991 24989 25010 25007 25007 25010 25012 25012
24987 24988 24988 24995 24983 24994 24969 24987 24990 25008 24995 25017 24995 25007 25007
24994 24980 24982 24981 24969 24980 24986 24994 24989 25010 24993 25009 25013 25009 25010
24992 24994 24980 24996 24987 24995 24960 24992 24971 25009 24993 24997 24993 24995 24993
24984 24979 24981 24994 24987 24981 24988 24990 24990 25008 24996 24991 25012 25009 24998
24993 24991 24993 24997 24984 24982 24997 24991 24990 25010 24995 24989 24998 25009 25012
24994 24994 24992 24987 25000 24980 24968 24990 24991 24994 24992 24989 25013 24991 24999
24993 24991 24990 24993 24984 24980 24991 24996 24990 24994 24996 24990 24991 24994 24996
24984 24995 24994 24980 24992 24979 24968 24990 24991 25009 24996 24991 24993 25001 25000

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 24956 bytes 100%
1,000 24955 bytes -1 byte 100%
10,000 24952 bytes -3 bytes 100%
100,000 24950 bytes -2 bytes 1.45%
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
25058 bytes +108 bytes (+0.43%) +1 byte
25057 bytes +107 bytes (+0.43%)
25067 bytes +117 bytes (+0.47%) +10 bytes
25059 bytes +109 bytes (+0.44%) +2 bytes
25064 bytes +114 bytes (+0.46%) +7 bytes
25103 bytes +153 bytes (+0.61%) +46 bytes
25120 bytes +170 bytes (+0.68%) +63 bytes
25151 bytes +201 bytes (+0.81%) +94 bytes
25155 bytes +205 bytes (+0.82%) +98 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 20944 bytes -4006 bytes (-16.06%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 21414 bytes -3536 bytes (-14.17%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 21475 bytes -3475 bytes (-13.93%)
Brotli (Wikipedia) brotli brotli -q 11 23401 bytes -1549 bytes (-6.21%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 24076 bytes -874 bytes (-3.50%)
LZMA2 (Wikipedia) xz xz -9 24080 bytes -870 bytes (-3.49%)
ZSTD (Wikipedia) zstd zstd -19 24653 bytes -297 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 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