How a JIT compiler helps performance of applications?

Posted by igorgue on Stack Overflow See other posts from Stack Overflow or by igorgue
Published on 2010-05-13T16:46:30Z Indexed on 2010/05/13 17:04 UTC
Read the original article Hit count: 327

Filed under:

jit

|

android

|

compilers

I just read that Android has a 450% performance improvement because it added a JIT compiler, I know what JIT is, but I don't really understand why is it faster than normal compiled code? or what's the difference with the older approach from the Android platform (the Java like run compiled bytecode).

Thanks!

© Stack Overflow or respective owner

Related posts about jit

.NET assembly cache / ngen / jit image warm-up and cool-down behavior

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I have an Input Method (IME) program built with C#.NET 2.0 DLL through C++/CLI. Since an IME is always attaching to another application, the C#.NET DLL seems not able to avoid image address rebasing. Although I have applied ngen to create a native image of that C#.NET 2.0 DLL and installed it… >>> More
What are the differences in JIT between Java and .Net

as seen on Stack Overflow - Search for 'Stack Overflow'
I know Microsoft .NET uses the NGEN utility to produce native machine code while Java has the Hotspot to do that. What Are the differences between those 2? >>> More
Building v8 without JIT

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I would like to run some tests on v8 with and without JIT to compare performances. I know JIT will improve my average speed performance, but it would be nice for me to have some actual more detailed tests results as I want to work with mobile platforms. I haven't found how to enable or disable… >>> More
What does a JIT compiler do?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi all, I was just watching the google IO videos and they talked about the JIT compiler they included in the android and showed a demo about performance improvements thanks to JIT compiler. I wondered what does exactly a JIT compiler do and wanted to hear from different people. So, What is the duty… >>> More
JIT compiler for C, C++, and the likes

as seen on Programmers - Search for 'Programmers'
Is there any just-in-time compiler out there for compiled languages, such as C and C++? (The first names that come to mind are Clang and LLVM! But I don't think they currently support it.) Explanation: I think the software could benefit from runtime profiling feedback and aggressively optimized… >>> More

Related posts about android

Please verify my layout: bottom button keeps coming up over keyboard

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi everyone, I have a layout which does almost what I want. There's just one bug regarding the button at the bottom. I should stay at the bottom at all times. But whenever I bring up the soft-keyboard the button will be displayed above the keyboard. This is not what I want but it should become covered… >>> More
Android programming. Application stopped unexpectedly.

as seen on Stack Overflow - Search for 'Stack Overflow'
I've just created a prototype of interface for my android app and tried to run it. Unfortunately I get an error that my app has stopped unexpectedly (my reputation doesn't allow me to post images so follow my links): screenshot of error message This is layout mode of editing. Everything looks as… >>> More
Listview Row Overlap Problem

as seen on Stack Overflow - Search for 'Stack Overflow'
I just updated my app and I am getting some odd complaints from people who update it. I am only getting complaints from people with non-stock android phones (phones that manufacturers have modified...HTC phones, cliq, pulse, etc), other phones like the Droid, Nexus work fine. My app (Photo Frame Deluxe)… >>> More
Why are some of my view not aligned correctly at the bottom of my relative layout?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have problems getting some of my views aligned in a relative layout that I use inside a row of my listview. Here is a screenshot from the layout builder in Eclipse, this is what I think it should look like: The next image is from the emulator. Now the TestTestTest View is at the top and covers… >>> More
Android RatingBar weirdness: Whenever I add a RatingBar to my layout, a bunch of the generated tags,

as seen on Stack Overflow - Search for 'Stack Overflow'
Whenever I use a RatingBar view in my layout, I suddenly get all kinds of compile errors. I'm using Android 2.0, but I've also tried 2.0.1, and 2.1, without joy. I also get a message: Shader 'android.graphics.BitmapShader' is not supported in Layout Editor, and an odd warning which may or maynot be… >>> More