[anonymoushn]

The benchmarks available for protobuf generally have it parsing like 5x slower than json (and I suspect the payloads are smaller, but not 5x smaller). I don't think that the code generators shipped with protobuf generate parsers of comparable quality to simdjson, so it's a bit unfair in that sense.

[vitus]

Can you point to some of these benchmarks? https://news.ycombinator.com/item?id=26934854 suggests that in at least one synthetic benchmark (with a 7.5KB protobuf message which expands to a 17KB JSON payload), protobuf parsing at 2GB/s would be comparable to JSON parsing at 5GB/s.

Meanwhile, simdjson's numbers (https://github.com/simdjson/simdjson/blob/master/doc/gbps.pn...) show a peak parsing speed of about 3GB/s depending on the workload. Of course, it's not clear you can compare these directly, since they were probably not run on systems with comparable specs. But it's not clear to me that there's a 5x difference.

Perhaps my experience differs because I'm used to seeing very large messages being passed around, but I'd be happy to reconsider. (Or maybe I should go all-in on Cap'n Proto.)