Optimization
JPenuchot opened this issue · comments
nlohmann::json has a nice interface but performance doesn't scale for what we're doing (processing hundreds of megabytes of JSON trace events).
Running ctbench-grapher-plot through perf shows that nlohmann::json-related calls are the ones that account for most overhead.
Most of the time is actually spent in gnuplot calls according to profiling data gathered with Tracy. Moving away from nlohmann::json would only cut a small part of the graph generation time. Performance gains will mostly depend on this issue: sciplot/sciplot#104