Hi

I'm Ritesh, co-founder of Superluminal. I write about software, performance, optimization and general software-related things.

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• From profiling to kernel patch: the journey to an eBPF performance fix

  11 Dec, 2025

  A story about how an innocent profiling session led to a change to the Linux kernel that makes eBPF map-in-map updates much faster.

• Optimizing libdwarf .eh_frame enumeration

  24 Nov, 2025

  For the Linux version of Superluminal we rely on unwind information stored in the .eh_frame section in a binary to perform stack unwinding. We’ll go over optimizations we made to libdwarf that greatly improve the performance of retrieving this information.