Hello Gcc, Compilation of production build(-O2 optimization turned on) of my project is taking a very long time and on further analysis I found that most of the compile time is eaten up by "var-tracking assignment" gcc pass. I see significant improvements in build time If I use "-fno-var-tracking" and also I don't intend to debug production build. However it is important that we be able to do post-mortem analysis of core file on production build. I tried loading a sample core-file in gdb and could see gdb complaining "optimized out" for couple of stack variables. So the question is, does "-fno-var-tracking" have any impact on post-mortem analysis of core file or does it just disable run time debugging capabilities ?