6 val checkCPUTimer: cpu_timer -> {sys: Time.time, usr: Time.time}
7 val checkCPUTimes: cpu_timer -> {gc: {sys: Time.time,
9 nongc: {sys: Time.time,
11 val checkGCTime: cpu_timer -> Time.time
12 val checkRealTimer: real_timer -> Time.time
13 val startCPUTimer: unit -> cpu_timer
14 val startRealTimer: unit -> real_timer
15 val totalCPUTimer: unit -> cpu_timer
16 val totalRealTimer: unit -> real_timer