Choose a version:
31% The original file has 280472 bytes (273.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 85916 bytes (83.9k, 31%).

After GZIP compression these minified files vary in size:
Boot
  35892 bytes (35.1k)
CDN
cdnjs
  31550 bytes (30.8k)
CDN
gzip -6 (default)
  31361 bytes (30.6k)
local copy
unpkg
  31315 bytes (30.6k)
CDN
gzip -9
  31302 bytes (30.6k)
local copy
libdeflate -12
  30324 bytes (29.6k)
local copy
7zip -mx=9 -tgzip
  30281 bytes (29.6k)
local copy
kzip -s0 -rn -b3
  30280 bytes (29.6k)
local copy
pigz -11 -n
  30231 bytes (29.5k)
local copy
Zopfli
  30174 bytes (29.5k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/vue/vue-2.5.3.min.js

You will automatically get the smallest Vue 2.5.3 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 1141 bytes by using my Vue 2.5.3 Zopfli version instead of the best available CDN (3.78% smaller than unpkg, 30174 vs. 31315 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 --mls4 --bsr20 --lazy --ohh

(found November 6, 2017)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 4  --mls4
block splitting recursion 20  --bsr20
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-2.5.3.min.js --location | md5sum
6744973f2e5551ce30d819acb344c600  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.5.3.min.zopfli.js.gz | md5sum
6744973f2e5551ce30d819acb344c600  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/vuejs/vue/vue-2.5.3.min.js --location | sha1sum
2ff12b3ae8a16f53ee373be8590e9afac85d8188  -
curl --silent --compressed http://minime.stephan-brumme.com/files/vue/vue-2.5.3.min.zopfli.js.gz | sha1sum
2ff12b3ae8a16f53ee373be8590e9afac85d8188  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 35892 bytes 6744973f2e5551ce30d819acb344c600 November 14, 2017 @ 18:15
cdnjs 31550 bytes 6744973f2e5551ce30d819acb344c600 (invalid)
unpkg 31315 bytes 6744973f2e5551ce30d819acb344c600 (invalid)

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

Other Versions

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

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
30174 bytes -2 bytes zopfli --i1000000 --mls4 --bsr20 --lazy --ohh November 6, 2017 @ 21:05
30176 bytes -3 bytes zopfli --i100000 --mls4 --bsr20 --lazy --ohh November 6, 2017 @ 15:39
30179 bytes -2 bytes zopfli --i10000 --mls4 --bsr20 --lazy --ohh November 6, 2017 @ 15:06
30181 bytes -4 bytes zopfli --i1000 --mls4 --bsr20 --lazy --ohh November 6, 2017 @ 14:15
30185 bytes zopfli --i100 --mls4 --bsr20 --lazy --ohh November 6, 2017 @ 13:34

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

Most recent activity on November 14, 2017 @ 18:15.

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
30222 30224 30208 30229 30230 30212 30228 30230 30238 30212 30229 30206 30206 30213 30201
30203 30204 30207 30205 30213 30205 30232 30209 30233 30202 30204 30231 30203 30212 30213
30206 30205 30205 30205 30203 30218 30200 30208 30201 30209 30201 30207 30209 30201 30211
30205 30202 30203 30202 30205 30206 30200 30201 30199 30201 30202 30202 30205 30206 30204
30210 30226 30226 30225 30216 30204 30201 30202 30201 30203 30201 30208 30205 30227 30206
30231 30228 30228 30227 30205 30203 30209 30206 30203 30200 30202 30206 30203 30205 30205
30206 30207 30207 30209 30208 30206 30200 30207 30201 30204 30202 30198 30199 30206 30208
30205 30206 30209 30202 30203 30204 30199 30210 30202 30202 30204 30207 30208 30207 30205
30191 30204 30206 30206 30204 30207 30204 30202 30201 30203 30201 30202 30201 30206 30207
30204 30203 30205 30205 30205 30206 30199 30206 30202 30202 30201 30227 30205 30206 30219
30203 30204 30195 30205 30205 30206 30199 30206 30201 30200 30200 30206 30205 30204 30206
30205 30180 30203 30202 30204 30205 30199 30202 30200 30200 30202 30202 30206 30206 30206
30206 30203 30207 30206 30204 30206 30202 30204 30227 30202 30202 30206 30203 30207 30210
30201 30203 30204 30205 30204 30208 30205 30203 30201 30200 30204 30207 30204 30204 30206
30224 30224 30227 30225 30204 30206 30207 30218 30203 30203 30216 30201 30200 30205 30206
30225 30223 30224 30206 30204 30207 30202 30203 30205 30200 30202 30202 30204 30202 30219
30210 30174 30203 30206 30204 30208 30204 30206 30201 30203 30202 30206 30204 30205 30205
30203 30203 30203 30204 30204 30202 30199 30207 30203 30200 30200 30207 30205 30204 30204
30205 30205 30206 30205 30206 30204 30199 30202 30205 30202 30200 30207 30205 30205 30205
30204 30206 30205 30206 30204 30203 30200 30210 30202 30200 30201 30207 30207 30205 30207
30205 30205 30204 30206 30205 30206 30202 30232 30202 30203 30200 30208 30234 30206 30207
30211 30223 30203 30204 30206 30207 30205 30203 30202 30203 30202 30207 30206 30206 30206
30201 30203 30204 30206 30205 30205 30204 30203 30201 30201 30201 30208 30207 30206 30204

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 30185 bytes 100%
1,000 30181 bytes -4 bytes 100%
10,000 30179 bytes -2 bytes 100%
100,000 30176 bytes -3 bytes 0.58%
1,000,000 30174 bytes -2 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
30286 bytes +112 bytes (+0.37%) +6 bytes
30286 bytes +112 bytes (+0.37%) +6 bytes
30303 bytes +129 bytes (+0.43%) +23 bytes
30280 bytes +106 bytes (+0.35%)
30301 bytes +127 bytes (+0.42%) +21 bytes
30333 bytes +159 bytes (+0.53%) +53 bytes
30365 bytes +191 bytes (+0.63%) +85 bytes
30399 bytes +225 bytes (+0.75%) +119 bytes
30418 bytes +244 bytes (+0.81%) +138 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 24717 bytes -5457 bytes (-18.09%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 25562 bytes -4612 bytes (-15.28%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 26612 bytes -3562 bytes (-11.80%)
Brotli (Wikipedia) brotli brotli -q 11 28101 bytes -2073 bytes (-6.87%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 28659 bytes -1515 bytes (-5.02%)
LZMA2 (Wikipedia) xz xz -9 28864 bytes -1310 bytes (-4.34%)
ZSTD (Wikipedia) zstd zstd -19 29624 bytes -550 bytes (-1.82%)

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