On 10/24/2014 10:02 AM, Brad King wrote: > I bisected it down to: > > commit 5abfde6cb8a1ae0b2825797eab6c2e9842eb7c49 > Author: Ben Boeckel <ben.boec...@kitware.com> > Date: Wed Mar 12 14:01:45 2014 -0400 > > cmDefinitions: Don't store parent lookups > > When looking up scopes, it is faster to not store the lookup locally to > keep the maps smaller and avoid extra allocations and rebalancing.
Here is a minimal standalone example: $ cat regression.cmake function(func var_name) list(APPEND ${var_name} value) set(${var_name} ${${var_name}} PARENT_SCOPE) set(${var_name} ${${var_name}} PARENT_SCOPE) endfunction() func(var) message(STATUS " var=[${var}]") func(var) message(STATUS " var=[${var}]") $ cmake-3.0 -P regression.cmake -- var=[value] -- var=[value;value] $ cmake-3.1 -P regression.cmake -- var=[value] -- var=[value] -Brad -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/cmake-developers