Ruby on Rails

[lightng]

All I can think of is that joke on another thread.

- Knock knock!

- Who's there?

- <long pause> Java

[minestrone]

Fill your boots with benchmarks..

http://shootout.alioth.debian.org/

PHP is putting in times 100* slower than java (-server JVM) , ruby is even worse, java is about 3 times slower than GNU C which is close to as fast as you can get.

No doubts java was slow 10 years ago but it's about as fast as you can get now and I do not see anyone funding much research into PHP and RUBY performance like IBM and SUN were able to.

[voodooflux]

No doubts java was slow 10 years ago but it's about as fast as you can get now and I do not see anyone funding much research into PHP and RUBY performance like IBM and SUN were able to.

I recall that Microsoft are working closely with Zend to improve the performance of PHP, albeit specifically on M$ platforms.

[minestrone]

I have done a bit of PHP development but could not actually say much about what's under the hood. When you change a PHP page does it actually get compiled into memory and translated into something more than the actual text in the script?

Looking at those benchmarks again it seems that ruby is the only one slower and also has more memory usage than java which is something I have noticed using it.

[voodooflux]

I have done a bit of PHP development but could not actually say much about what's under the hood. When you change a PHP page does it actually get compiled into memory and translated into something more than the actual text in the script?

Looking at those benchmarks again it seems that ruby is the only one slower and also has more memory usage than java which is something I have noticed using it.

My (limited) understanding is that at a basic level PHP code is compiled at runtime when each page is requested, but various accelerators are available that offer the ability to cache the code in a compiled state.

[jkoder]

All I can think of is that joke on another thread.

- Knock knock!

- Who's there?

- <long pause> Java

It was actually me who posted that!

[lightng]

It was actually me who posted that!

Oh OK. Haha.

[MPwannadecentincome]

Java was always 'the future' but never quite got there. It's still 'as slow as molasses in winter' even today.

Well that depends, as someone else said, you can write slow ram eating code in any language.

a common mistake is to forget to run the live system with '-server' on the JVM!

I know lots of enterprise systems running in java - these are scaleable systems processing thousands of transactions a minute.

One thing that is bad though is building web forms - this is a slow development task even with struts or whatever the latest fad is, in this respect PHP is much more productive and this needs to be balanced against the speed of the resulting system, it may be cheaper to buy more servers to run a slow front end than to spend extra on contractors to write it to run faster!

I led a team of java developers about 5 years ago who had to write really fast java code, it was not a real problem you just had to be really careful how do it - I'm not a techie so I can't tell you how.

[minestrone]

Well that depends, as someone else said, you can write slow ram eating code in any language.

a common mistake is to forget to run the live system with '-server' on the JVM!

I know lots of enterprise systems running in java - these are scaleable systems processing thousands of transactions a minute.

One thing that is bad though is building web forms - this is a slow development task even with struts or whatever the latest fad is, in this respect PHP is much more productive and this needs to be balanced against the speed of the resulting system, it may be cheaper to buy more servers to run a slow front end than to spend extra on contractors to write it to run faster!

I led a team of java developers about 5 years ago who had to write really fast java code, it was not a real problem you just had to be really careful how do it - I'm not a techie so I can't tell you how.

A common mistake is to not charge for 4 weeks performance tuning work while only adding -server to the JVM.

[jkoder]

Well that depends, as someone else said, you can write slow ram eating code in any language.

a common mistake is to forget to run the live system with '-server' on the JVM!

I know lots of enterprise systems running in java - these are scaleable systems processing thousands of transactions a minute.

One thing that is bad though is building web forms - this is a slow development task even with struts or whatever the latest fad is, in this respect PHP is much more productive and this needs to be balanced against the speed of the resulting system, it may be cheaper to buy more servers to run a slow front end than to spend extra on contractors to write it to run faster!

I led a team of java developers about 5 years ago who had to write really fast java code, it was not a real problem you just had to be really careful how do it - I'm not a techie so I can't tell you how.

The best way to write fast code in Java is to keep your code simple, the JVM can optimise simple code that it understands.

Java is used in real-time trading systems on Wall Street. It really is that quick, unless you listen to people (on here) who still judge in on 1995 benchmarks.

Good note about the -server flag. You can also change this in the JVM config file. I'd bet you're right that there is a lot of people not using this.