libc-bench

a project of Eta Labs

libc-bench is a set of time- and memory-efficiency tests to compare implementations of various C/POSIX standard library functions. Coverage includes:

• Malloc throughput with varying degrees and forms of contention between threads.
• Malloc overhead and ability to return freed memory to the OS.
• Literal string and regular expression searches.
• Thread creation and joining throughput.
• UTF-8 decoding.
• Stdio buffered reads and writes.

Download

Latest releases are available here.

You can also browse the current source.

Results

At present I have not collected any scientific results. Some results from key tests on my particular test machine are included in the libc comparison page. Compiling a set of results for a much broader collection of libc implementations (for example, BSDs and proprietary systems) as well as different CPU architectures and variants would be quite an interesting project, and unfortunately one for which I do not have the time or resources.