Programs

The C++ programs ported are the non-iteractive programs from the LLVM Test Suite Shootout C++ which originates in the Programming Language Shootout:

• ackermann
• ary
• ary2
• ary3
• fibo
• hash
• hash2
• heapsort
• lists
• lists1
• matrix
• methcall
• moments
• nestedloop
• objinst
• random
• sieve
• strcat

The current criteria for programs I picked are:

• they are small
• they produce some output so that the correctness of porting can be checked
• they are deterministic and can be run without any interactive user input from a beginning to an end
• their execution times indicate their run time performance

I'd like to add more programs in the future.

Porting notes

When porting from C++ to Rust, I stick with the idiomatic style, including the use of the standard library types, as much as appropriate. For example, I'd use Rust's String type where C++ std::string (or a C char* string) is used. Similarly, I'd use Rust's Vec type in place for C++ std::vector and C/C++ raw array types.

I wrote down porting notes for each program.

Benchmark results and performance analysis

I included benchmark results between the C++ and the Rust versions. I also included performance analysis based on the generated code for the programs whose benchmark results were significantly different,