To improve the execution time of the resulting code, one of the techniques of compiler optimization is register allocation, where the most frequently used values of the compiled program are kept in the fast processor registers.
42.
That is, at runtime the compiled program contains references to memory addresses and offsets rather than the textual identifier tokens ( these memory addresses, or offsets, having been assigned by the compiler to each identifier ).
43.
There are pre-compiled Windows version available with Cygwin and MingW-you can find links . ( A compiled program is called a binary ) However, you may be better off downloading Visual Studio C + + Express Edition.
44.
The Beaujolais effect is a situation where adding or removing a single " use clause " in an Ada program changes the behavior of the compiled program, a very undesirable effect in a language designed for semantic precision.
45.
Most computer users don't want to worry about compiling programs before running them or writing their own device drivers _ operations that take place under the hood in Windows but sometimes rear their ugly heads on Linux systems.
46.
The virtual machine paradigm allows the same compiler output to be used across multiple target systems, although this is not always ideal because virtual machines are often slower and the compiled program can only be run on computers with that virtual machine.
47.
When a script's job can be accomplished by setting up a filter commands perform most of the work, the slowdown is mitigated, but a complex script is typically several orders of magnitude slower than a conventional compiled program that performs an equivalent task.
48.
BrookGPU compiled programs written using the Brook stream programming language, which is a variant of ANSI C . It could target OpenGL v1.3 +, DirectX v9 + or AMD's Close to Metal for the computational backend and ran on both Microsoft Windows and Linux.
49.
There is no way that a compiler can guarantee that, for all program source code, the fastest ( or smallest ) possible equivalent compiled program is output; such a compiler is fundamentally impossible because it would solve the halting problem ( assuming Turing completeness ).
50.
When silicon technology allowed for wider implementations ( with more execution units ) to be built, the compiled programs for the earlier generation would not run on the wider implementations, as the encoding of binary instructions depended on the number of execution units of the machine.
