How much javascript would you have when you decide that minifying is
called for?
Nov 14 '08
50  3866 
rf wrote:
Why minimize a Javascript file to save the odd K or two then the same page
probably has a dozen images that could be better compressed (at almost zero
loss of quality) saving hundreds of K?
Because most browsers block the loading of additional assets until the
JavaScript file has been completely loaded, compiled, and executing. The largest
component is the loading time, and minification and gzipping are very effective
optimizations.
I highly recommend that you get Steve Sourders's book on performance.
Jorge wrote:
Thomas 'PointedEars' Lahn wrote:
>>A 1000 lines .js with soft-tabs has several kilobytes of %20's...
So what? Assuming "several" means 2 (KiB)
2 spaces per tab stop per line account for much more than that.
Even if its twice that amount it is still negligible as compared to the rest
of the file.
>that's about 0.293 seconds download time on a 56k modem in the best
case (56 kBit/s), about 0.341 seconds in the worst case that I have
seen yet (48 kBit/s).
...and there are millions of mobile users out there.
You don't serve large script files to mobile devices.
Anyhow, for 2 KiB that is
13.0 kbit/s on GSM, ca. 1.260 s
14.4 kbit/s on CSD, ca. 1.138 s
115.2 kbit/s on HSCSD, ca. 0.142 s
171.2 kbit/s on GPRS, ca. 0.096 s
384.0 kbit/s on EDGE, ca. 0.043 s
384.0 kbit/s to 7.2 Mbit/s on UMTS, ca. 0.043 down to 0.002 s
And, as others have already noted, if you are worried about the script size
you really should be worried about the document and image file size first.
>Literally in the blink of an eye already, and broadband Internet
connections, which are more than 26 times faster than that, tend to be
more common nowadays.
What's in your opinion the number of kiloBytes of junk that is ok to send
again and again and again ?
Wrong question. Whitespace is _not_ junk.
PointedEars
--
Anyone who slaps a 'this page is best viewed with Browser X' label on
a Web page appears to be yearning for the bad old days, before the Web,
when you had very little chance of reading a document written on another
computer, another word processor, or another network. -- Tim Berners-Lee
On Nov 15, 7:57*pm, Thomas 'PointedEars' Lahn <PointedE...@we b.de>
wrote:
>
You don't serve large script files to mobile devices.
You don't know what you're talking about : The last iPhone webApp that
I have written (not counting iui.js): 2256 lines of JavaScript, 64592
characters -43286 characters minified (conservative setting) ->
11561 bytes gzipped.
Minification alone shrinked it by 20k+.
Anyhow, for 2 KiB that is
13.0 kbit/s on GSM, (...) etc etc
Mobile users don't get that speeds, those are (in theory) maximum
speeds, nothing to do with what you really get.
--
Jorge.
On Nov 15, 7:57*pm, Thomas 'PointedEars' Lahn <PointedE...@we b.de>
wrote:
>
And, as others have already noted, if you are worried about the script size
you really should be worried about the document and image file size first..
Yeah, but not in this thread. This one is about minifying JS.
--
Jorge.
On Nov 15, 7:57*pm, Thomas 'PointedEars' Lahn <PointedE...@we b.de>
wrote:
>
What's in your opinion the number of kiloBytes of junk that is ok to send
again and again and again ?
Wrong question. *Whitespace is _not_ junk.
Huh ?
--
Jorge.
Douglas Crockford wrote:
rf wrote:
I highly recommend that you get Steve Sourders's book on performance.
It's probably worthy of adding to the FAQ.
--
comp.lang.javas cript FAQ <URL: http://jibbering.com/faq/ >
Jorge wrote:
On Nov 15, 7:57 pm, Thomas 'PointedEars' Lahn <PointedE...@we b.de>
wrote:
>You don't serve large script files to mobile devices.
You don't know what you're talking about: The last iPhone webApp that
I have written (not counting iui.js): 2256 lines of JavaScript, 64592
characters -43286 characters minified (conservative setting) ->
11561 bytes gzipped.
Minification alone shrinked it by 20k+.
>Anyhow, for 2 KiB that is
13.0 kbit/s on GSM, (...) etc etc
Mobile users don't get that speeds, those are (in theory) maximum
speeds, nothing to do with what you really get.
Building into one file reduces the number of HTTP requests and adds one
file into the cache (not 20 or so, which can easily happen when applying
good old SRP).
If the file is minified, it will take less room in the cache. Cache
limits are finite. In mobile devices (like iPhone), cache is generally
not as large as a desktop browser.
Garrett
--
comp.lang.javas cript FAQ <URL: http://jibbering.com/faq/ >
Jorge wrote:
Thomas 'PointedEars' Lahn wrote:
>You don't serve large script files to mobile devices.
You don't know what you're talking about: The last iPhone webApp that
I have written (not counting iui.js): 2256 lines of JavaScript, 64592
characters -43286 characters minified (conservative setting) ->
11561 bytes gzipped.
I happen to own an iPhone 3G. Its support includes EDGE and UMTS. What was
your problem again?
Minification alone shrinked it by 20k+.
On EDGE (I'm not even talking about UMTS) that makes about 0.860+ s less --
blink of an eye.
That said, you don't even see the contradiction: cutting off 20k+ due to
minimization from what, about 100k+ of code? And you are actually caring
about mobile users? That's ridiculous.
>Anyhow, for 2 KiB that is
13.0 kbit/s on GSM, (...) etc etc
Mobile users don't get that speeds, those are (in theory) maximum
speeds, nothing to do with what you really get.
13.0 kbit/s *is about* the transfer rate of (original) GSM (which is not
very common anymore), channel splitting, syncing, bit error correction, and
time slots already considered. You may be right about the other transfer
rates, however even then the time difference would be negligible.
And you still miss the point.
PointedEars
--
Anyone who slaps a 'this page is best viewed with Browser X' label on
a Web page appears to be yearning for the bad old days, before the Web,
when you had very little chance of reading a document written on another
computer, another word processor, or another network. -- Tim Berners-Lee
On Nov 16, 6:46 pm, Thomas 'PointedEars' Lahn <PointedE...@we b.de>
wrote:
>
That said, you don't even see the contradiction: cutting off 20k+ due to
minimization from what, about 100k+ of code? And you are actually caring
about mobile users? That's ridiculous.
That's ridiculous:
"Cutting 30k by gzipping is allright, but cutting 20k+ by minifying
isn't."
duh!
--
Jorge.
On Nov 16, 6:46*pm, Thomas 'PointedEars' Lahn <PointedE...@we b.de>
wrote:
>
That said, you don't even see the contradiction: cutting off 20k+ due to
minimization from what, about 100k+ of code? *And you are actually caring
about mobile users? *That's ridiculous.
This is ridiculous:
"Cutting 30k by gzipping is allright, but cutting 20k by minifying
isn't."
duh!
--
Jorge.
"Silly things such as logic, common sense, rational
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