Hi devs, Is there a way to avoid running the archiver (ar) every time a petsc directory is compiled?
The reason I'm asking this is that when libpetsc.lib becomes large enough (say 100MB+, esp. for debug build), "ar Sqc" on cygwin takes very long in each directory. Depending on OS caching, very long can be 10 seconds per PETSc directory just to run ar. It creates a new temp file from scratch, puts stuff from libpetsc.lib and new stuff in it and then renames the temp file. As you can imagine, the compilation process is fast in the beginning but crawls by the end. I've seen the same IO sequence on Linux (with Sqc flags to ar), but since cygwin IO is slower the effect is more clearly visible. Building within a ramdisk leads to 25% faster compilation but it was more of a curiosity. Chetan
