I recall a specific project involving a network appliance that generated large log streams. Our bottleneck was the log parser, which was aggressively using stri

I recall a specific project involving a network appliance that generated large log streams. Our bottleneck was the log parser, which was aggressively using string.Substring() to isolate fields. This approach continuously allocated new string objects on the heap, which led to excessive pressure on the GC. The transition to using ReadOnlySpan<char> immediately addressed the allocation issue. We were able to represent slices of the incoming buffer without any heap allocations and the parser logic was simplified significantly.