Some fireplace stories. Part of the work was done under the Slovenian Agency for Research and Development project J1-6545: "High performance computing algorithms in theoretical physics" (2004 - 2007).

With processor consolidation (x86_64) and better LAPACK compilations benchmarking has seemingly moved out of view but was crucial for efficiency in the 2000's (e.g. FPU pipelining).
Reinventing the 64-bit computing
The transition from 64-bit Solaris on Sparc to Solaris and 64-bit Linux on x86_64 was nontrivial for large memory programs.
Code development
Some free/open source stories.
System administration
After 2008, I managed the first Lustre cluster in Southern Europe.

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