Version 0.9.0 is a major rework with quite a number of important changes and new features. These are the highlights, see below for details:

• kcbench now supports building a configuration generated with make allmodconfig
• compiling with gcc10 and clang (with or without LLVM=1) are now supported
• kcbench will now default to compiling Linux 5.7 for gcc10, clang10, and all compilers it does not recognize
• a totally new approach for finding the optimal number of jobs that kcbench will use when compiling the kernel (make -j #), as measurements showed some systems (like an AMD Threadripper that was tested) compile the kernel quicker if SMT (aka HT/Hyper-Threading) is not used (see below and the man page for details)
• the old and slightly unintuitive “kcbench points” result was dropped; instead show a "rate per hour" value for speed runs
• kcbench now prints more details about the system before starting to measure, including the CPUfreq driver and governor
• quite a few command line options and were changed to make usage more intuitive and consistent; some defaults have changed, too
• kcbench finally has a Makefile for installing
• the man page was improved quite a lot
• handle errors during compilation more efficiently and show the output from make by default
• cross-compilation is now support (still experimental!)
• besides compiling one kernel really quick kcbench now supports a mode called “rate-run” (aka “kernbenchrate”), where it compiles multiple kernels in parallel (still experimental!) to keep all CPU cores busy all the time.