Use a leaner perfetto trace format; Fuschia Trace Format or Perfetto Protobuf

[lucamuscat]

The JSON Chrome Trace Event Format is a simple JSON data format which can be vizualized by Perfetto. The JSON format trades serialization performance & payload size for simplicity. Unlike speedscope's format, which is an alternative trace format, the JSON Chrome Trace Event Format does not make use of basic compaction techniques, such as string interning.

The following document is a survey on existing trace formats similar to perfetto.

Perfetto natively supports two other trace formats, which are the Fuschia Trace Format (FTF), & the Protobuf trace format. Tristan Hume's blog post on tracing tools provides a short & sweet summary on these formats. In short, they are both compact binary formats. The protobuf feature comes with more features, but is only documented through its protobuf files, & requires protobuf, which is not a small dependency.

Investigate both FTF & the Protobuf Trace format, & start outputting trace files in one of these formats.