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What's the value of this in quant circles? My PhD involves doing quite a lot of optimisations to code so that it runs faster (as a very simplistic example, arranging loops for optimum memory access) and also some MPI and OpenMP. Is there any value in knowing this stuff for quant work? I assume most firms don't have big supercomputers hence MPI is largely redundant, but is it performance to have high performance code, or just code that works?