You can use the V8 snapshot functionality to precompile the code. This still means that you have to have a full version of V8 running to load the snapshot (i.e., you don’t get stand-alone native code, it needs to run inside the V8 VM), so all you save is the compilation time. Also, the quality … Read more
Is JNI that slow? JNI has already been optimized a lot, you should give it a try first. But it indeed has certain overhead, see details. This overhead can be significant if a native function is simple and is called frequently. JDK has a private API called Critical Natives to reduce overhead of calling functions … Read more
As far as I know, there are no static compilers for JavaScript. It is certainly theoretically possible; however, a static compilation of JavaScript would need a very heavyweight runtime to support all of its features (such as dynamic typing and eval). As a small aside, when presented with the need to statically compile Python (another … Read more
When you define functions in an interpreted language (as opposed to a compiled language). You have access to the file / string / text that defines the function. In JavaScript for example you can read the definition body text of a function you have defined. If you try to do the same for a function … Read more
Both Chrome and Firefox are open source and you can look at the implementation of any part of the javascript engine in the source code for those products. Other browsers have their own implementation (like IE) that is not available to the public to look at. The Chrome v8 javascript engine code is here: https://github.com/v8/v8 … Read more
I don’t have any experience of this, but a bit of digging shows that the library should be unloaded when the classloader which loaded the library is garbage collected. Links: Invocation API docs (Sun) – look for “Library and Version Management” Java JNI DLL Unloading tutorial
There used to be a tool called GCJ that was part of GCC, but it’s been removed. Now, all the links in the GCC site re-direct to their non-GCJ equivalents. NB: the comments all refered to my original answer saying you can compile Java to native code with GCJ.
Microsoft has an article describing how you can Compile MSIL to Native Code You can use Ngen. The Native Image Generator (Ngen.exe) is a tool that improves the performance of managed applications. Ngen.exe creates native images, which are files containing compiled processor-specific machine code, and installs them into the native image cache on the local … Read more
Let’s say that logcat show you the following crash log (this is from one of my projects): I/DEBUG ( 31): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** I/DEBUG ( 31): Build fingerprint: ‘generic/sdk/generic:2.3/GRH55/79397:eng/test-keys’ I/DEBUG ( 31): pid: 378, tid: 386 >>> com.example.gltest <<< I/DEBUG ( 31): … Read more