$ go run ./p7uGl0JZ_TR.go 
NoEmbedStruct
without pool: 1.558109ms
with pool: 89.337184ms

EmbedStruct
without pool: 651.618531ms
with pool: 84.505615ms

# https://stackoverflow.com/questions/45003259/passing-an-optimization-flag-to-a-go-compiler
# -N : Disable optimizations
# -l : Disable inlining

$ go run -gcflags '-N -l' ./p7uGl0JZ_TR.go 
NoEmbedStruct
without pool: 139.720966ms
with pool: 97.43476ms

EmbedStruct
without pool: 672.334312ms
with pool: 91.052924ms

# new(Data) 改寫成 Data{b:make([]byte, 1024)}

$ go run ./p7uGl0JZ_TR.go
NoEmbedStruct
without pool: 1.330158ms
with pool: 82.081171ms

EmbedStruct
without pool: 1.304114ms
with pool: 80.288109ms

$ go run -gcflags '-N -l' ./p7uGl0JZ_TR.go 
NoEmbedStruct
without pool: 136.941637ms
with pool: 94.261001ms

EmbedStruct
without pool: 102.397449ms
with pool: 89.48266ms