boost src/ offloading #675

Job	Run time
windows-msvc-shared (FLEXBUFFERS)	5m 44s
windows-msvc-shared (CAPNPROTO)	9m 9s
windows-msvc-shared (JSON)	11m 50s
windows-msvc-shared (YAML)	4m 24s
windows-msvc-shared (AVRO)	8m 22s
windows-msvc-shared (PARQUET)	39m 39s
windows-msvc-shared (CBOR)	9m 0s
windows-msvc-shared (TOML)	4m 15s
windows-msvc-shared (UBJSON)	7m 20s
windows-msvc-shared (BOOST_SERIALIZATION)	6m 27s
windows-msvc-shared (XML)	4m 24s
windows-msvc-shared (MSGPACK)	3m 46s
windows-msvc (CEREAL)	4m 38s
windows-msvc (benchmarks)	50m 33s
windows-msvc (CAPNPROTO)	8m 4s
windows-msvc (TOML)	4m 1s
windows-msvc (XML)	4m 32s
windows-msvc (BOOST_SERIALIZATION)	5m 29s
windows-msvc (AVRO)	7m 11s
windows-msvc (FLEXBUFFERS)	5m 53s
windows-msvc (UBJSON)	7m 20s
windows-msvc (PARQUET)	42m 10s
windows-msvc (JSON)	11m 55s
windows-msvc (YAML)	4m 44s
windows-msvc (CBOR)	8m 42s
windows-msvc (MSGPACK)	4m 29s
	4h 44m 1s

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