Choose a version:
34% The original file has 273199 bytes (266.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 93107 bytes (90.9k, 34%).

After GZIP compression these minified files vary in size:
Boot
  38142 bytes (37.2k)
CDN
jsdelivr
  36792 bytes (35.9k)
CDN
Baidu
  33084 bytes (32.3k)
CDN
cdnjs
  33078 bytes (32.3k)
CDN
Microsoft
  32915 bytes (32.1k)
CDN
gzip -6 (default)
  32846 bytes (32.1k)
local copy
Google
  32822 bytes (32.1k)
CDN
cdnhttps
  32822 bytes (32.1k)
CDN
gzip -9
  32809 bytes (32.0k)
local copy
Sina
  32802 bytes (32.0k)
CDN
libdeflate -12
  31777 bytes (31.0k)
local copy
7zip -mx=9 -tgzip
  31739 bytes (31.0k)
local copy
Yandex
  31665 bytes (30.9k)
CDN
kzip -s0 -rn -b2
  31664 bytes (30.9k)
local copy
pigz -11 -n
  31656 bytes (30.9k)
local copy
Zopfli
  31644 bytes (30.9k)
local copy
Zopfli (defluff)
  31643 bytes (30.9k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/jquery/jquery-1.10.2.min.js (or via HTTPS)

You will automatically get the smallest jQuery 1.10.2 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 21 bytes by using my jQuery 1.10.2 Zopfli version instead of the best available CDN (0.07% smaller than Yandex, 31644 vs. 31665 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 --mls32 --bsr16 --lazy --ohh

(found October 21, 2015)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 32  --mls32
block splitting recursion 16  --bsr16
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 (31643 bytes).

Verify file integrity

After decompression, my uncompressed files are identical to the original ones:

MD5:
curl --silent --compressed https://code.jquery.com/jquery-1.10.2.min.js --location | md5sum
628072e7212db1e8cdacb22b21752cda  -
curl --silent --compressed https://minime.stephan-brumme.com/files/jquery/jquery-1.10.2.min.zopfli.js.gz | md5sum
628072e7212db1e8cdacb22b21752cda  -

SHA1:
curl --silent --compressed https://code.jquery.com/jquery-1.10.2.min.js --location | sha1sum
0511abe9863c2ea7084efa7e24d1d86c5b3974f1  -
curl --silent --compressed https://minime.stephan-brumme.com/files/jquery/jquery-1.10.2.min.zopfli.js.gz | sha1sum
0511abe9863c2ea7084efa7e24d1d86c5b3974f1  -

These CDNs send you the original file:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Microsoft 32915 bytes 628072e7212db1e8cdacb22b21752cda (invalid)
Sina 32802 bytes 628072e7212db1e8cdacb22b21752cda (invalid)

And some CDNs send you a different file:
CDN Size (compressed) MD5 (uncompressed) Comment / Diff Timestamp
Boot 38142 bytes e0e0559014b222245deb26b6ae8bd940 < //@ sourceMappingURL=jquery-1.10.2.min.map
> //@ sourceMappingURL=jquery.min.map
March 18, 2015 @ 09:39
jsdelivr 36792 bytes ce7885a9962507158e5e2bc11cfab22a < (function(e,t){var n,r,i=typeof t,o=e.location,a=e.documen [...]
< }({});var B=/(?:\{[\s\S]*\}|\[[\s\S]*\])$/,P=/([A-Z])/g;fu [...]
< u[o]&&(delete u[o],c?delete n[l]:typeof n.removeAttribute! [...]
> (function (e, t) {
> var n, r, i = typeof t, o = e.location, a = e.document [...]
> return new x.fn.init(e, t, r)
> }, w = /[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/.source, T [...]
> return t.toUpperCase()
> }, q = function (e) {
> (a.addEventListener || "load" === e.type || "compl [...]
[...]
(invalid)
Baidu 33084 bytes e39d7f174407886a84c437f14182e57a < //@ sourceMappingURL=jquery-1.10.2.min.map
> //@ sourceMappingURL=jquery.min.map
January 7, 2015 @ 10:16
cdnjs 33078 bytes e0e0559014b222245deb26b6ae8bd940 < //@ sourceMappingURL=jquery-1.10.2.min.map
> //@ sourceMappingURL=jquery.min.map
(invalid)
Google 32822 bytes e0e0559014b222245deb26b6ae8bd940 < //@ sourceMappingURL=jquery-1.10.2.min.map
> //@ sourceMappingURL=jquery.min.map
(invalid)
cdnhttps 32822 bytes e0e0559014b222245deb26b6ae8bd940 < //@ sourceMappingURL=jquery-1.10.2.min.map
> //@ sourceMappingURL=jquery.min.map
December 24, 2015 @ 07:33
Yandex 31665 bytes e0e0559014b222245deb26b6ae8bd940 < //@ sourceMappingURL=jquery-1.10.2.min.map
> //@ sourceMappingURL=jquery.min.map
June 15, 2015 @ 21:17

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

Other Versions

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

3.3.1, 3.3.0,
3.2.1, 3.2.0,
3.1.1, 3.1.0,
3.0.0,
2.2.4, 2.2.3, 2.2.2, 2.2.1, 2.2.0,
2.1.4, 2.1.3, 2.1.2, 2.1.1, 2.1.0,
2.0.3, 2.0.2, 2.0.1, 2.0.0,
1.12.4, 1.12.3, 1.12.2, 1.12.1, 1.12.0,
1.11.3, 1.11.2, 1.11.1, 1.11.0,
1.10.2, 1.10.1, 1.10.0,
1.9.1, 1.9.0,
1.8.3, 1.8.2, 1.8.1, 1.8.0,
1.7.2, 1.7.1, 1.7.0,
1.6.4, 1.6.3, 1.6.2, 1.6.1, 1.6,
1.5.2, 1.5.1, 1.5,
1.4.4, 1.4.3, 1.4.2, 1.4.1, 1.4,
1.3.2, 1.3.1, 1.3,
1.2.6, 1.2.5, 1.2.4, 1.2.3, 1.2.2, 1.2.1, 1.2,
1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1,
1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0

The project site contains an overview how well these versions were compressed.
Other interesting projects are AngularJS, BackboneJS, Bootstrap, D3, Dojo, Ember, Knockout, lodash, React, Socket.IO, ThreeJS, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:
Size Improvement Parameters Found
31644 bytes -2 bytes zopfli --i100000 --mls32 --bsr16 --lazy --ohh October 21, 2015 @ 15:42
31646 bytes -1 byte zopfli --i100000 --mls1024 --bsr10 --lazy --ohh September 2, 2015 @ 07:01
31647 bytes -1 byte zopfli --i10000 --mls1024 --bsr10 --lazy --ohh September 1, 2015 @ 21:41
31648 bytes -5 bytes zopfli --i1000 --mls1024 --bsr10 --lazy --ohh September 1, 2015 @ 20:41
31653 bytes zopfli --i100 --mls1024 --bsr10 --lazy --ohh September 1, 2015 @ 20:29

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

Most recent activity on June 16, 2016 @ 14:31.

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
31659 31660 31659 31660 31660 31658 31657 31655 31656 31655 31656 31651 31656 31655 31658
31665 31659 31659 31646 31658 31652 31657 31656 31661 31655 31654 31653 31661 31663 31665
31662 31660 31656 31652 31658 31658 31657 31658 31659 31650 31655 31664 31663 31665 31664
31659 31658 31657 31656 31657 31656 31659 31651 31655 31657 31654 31651 31663 31663 31664
31660 31660 31659 31655 31659 31652 31658 31655 31655 31655 31654 31664 31664 31666 31660
31659 31660 31658 31659 31657 31652 31656 31659 31658 31647 31655 31664 31664 31665 31665
31656 31657 31656 31657 31658 31648 31657 31657 31658 31646 31655 31664 31665 31664 31664
31648 31657 31658 31654 31658 31656 31648 31658 31655 31654 31654 31665 31664 31664 31664
31658 31657 31659 31655 31659 31656 31657 31647 31657 31655 31656 31654 31664 31665 31664
31659 31660 31657 31657 31659 31650 31658 31647 31657 31654 31654 31664 31664 31664 31665
31658 31657 31657 31655 31657 31659 31657 31650 31645 31659 31655 31647 31664 31664 31665
31659 31659 31658 31655 31657 31653 31658 31648 31655 31654 31649 31651 31664 31664 31664
31658 31657 31657 31658 31644 31652 31655 31660 31657 31654 31655 31654 31664 31664 31665
31659 31658 31658 31655 31651 31652 31657 31658 31658 31654 31655 31648 31664 31663 31664
31658 31657 31658 31656 31657 31656 31657 31658 31657 31655 31654 31654 31664 31664 31666
31659 31657 31659 31655 31657 31652 31657 31651 31663 31654 31655 31663 31664 31664 31665
31648 31659 31659 31663 31663 31652 31647 31648 31658 31648 31654 31654 31664 31664 31664
31657 31658 31657 31656 31657 31658 31655 31648 31658 31645 31654 31664 31664 31665 31665
31658 31659 31657 31655 31658 31656 31655 31661 31655 31647 31655 31663 31664 31664 31665
31661 31657 31658 31655 31660 31650 31648 31647 31655 31654 31656 31648 31664 31664 31664
31658 31658 31659 31655 31658 31656 31657 31657 31650 31645 31654 31655 31660 31664 31665
31647 31652 31663 31665 31647 31656 31657 31655 31658 31647 31654 31655 31664 31664 31665
31659 31659 31657 31656 31657 31656 31657 31651 31657 31654 31654 31654 31664 31664 31667

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 31650 bytes 100%
1,000 31647 bytes -3 bytes 100%
10,000 31646 bytes -1 byte 100%
100,000 31644 bytes -2 bytes 1.74%
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
31734 bytes +90 bytes (+0.28%) +70 bytes
31730 bytes +86 bytes (+0.27%) +66 bytes
31664 bytes +20 bytes (+0.06%)
31669 bytes +25 bytes (+0.08%) +5 bytes
31680 bytes +36 bytes (+0.11%) +16 bytes
31718 bytes +74 bytes (+0.23%) +54 bytes
31725 bytes +81 bytes (+0.26%) +61 bytes
31761 bytes +117 bytes (+0.37%) +97 bytes
31796 bytes +152 bytes (+0.48%) +132 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 26062 bytes -5582 bytes (-17.64%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 26709 bytes -4935 bytes (-15.60%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 28209 bytes -3435 bytes (-10.86%)
Brotli (Wikipedia) brotli brotli -q 11 29505 bytes -2139 bytes (-6.76%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 29920 bytes -1724 bytes (-5.45%)
LZMA2 (Wikipedia) xz xz -9 30644 bytes -1000 bytes (-3.16%)
Zstandard (Wikipedia) zstd zstd -19 31176 bytes -468 bytes (-1.48%)

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