pprof about go-recipes HOT 5 CLOSED

$ TDINPUT=input.td go test -cpuprofile cpu.out -bench=Preall -benchtime=5s
...

# --nodefraction tells pprof to ignore nodes that take less than 5% of the
# total time - this significantly reduces the clutter in the produced graph

$ go tool pprof --nodefraction=0.05 ./example.com.test cpu.out
...
(pprof) web

$ TDINPUT=input.td go test -memprofile=mem.mprof -bench=Preall -benchtime=5s
...

$ go tool pprof --alloc_objects example.com.test mem.mprof
...
(pprof) list scanIdentifier
Total: 27388406
ROUTINE ======================== example%2ecom.(*Lexer).scanIdentifier
  21501647   21501647 (flat, cum) 78.51% of Total
         .          .    238:func (lex *Lexer) scanIdentifier() Token {
         .          .    239: startpos := lex.rpos
         .          .    240: for isAlpha(lex.r) || isDigit(lex.r) {
         .          .    241:         lex.next()
         .          .    242: }
  21501647   21501647    243: return Token{IDENTIFIER, string(lex.buf[startpos:lex.rpos]), startpos}
         .          .    244:}
         .          .    245:
         .          .    246:func (lex *Lexer) scanNumber() Token {
         .          .    247: startpos := lex.rpos
         .          .    248: for isDigit(lex.r) {