Commit b1a05d6c authored by Committed by Brad KingBrowse files
Revise implementation of case-insensitive command names
Store both the as-written and lower-case command names and use the latter to avoid case-insensitive string comparisons. With this I obtain 2-6% speed increase (on Windows) for the configure step with no significant changes in memory usage. A case-insensitive comparison is a lot slower than just calling `==` because the operator will use things like memcmp, so prefer the latter. The `cmSystemTools::LowerCase` function allocates a new string each time it is called, so before this change we were allocating in: * cmMakefile::Configure two times for each function (to look for `cmake_minimum_required` and `project`) * cmMakefile::ExecuteCommand twice by function by calling cmState::GetCommand and copying the name Now we are only allocating once by function instead of four.