Show time spent in each system call

-T option is used to print time spent in each system call. E.g.:

# strace -T ls
execve("/usr/bin/ls", ["ls"], 0x7ffd141a4ee8 /* 20 vars */) = 0 <0.000354>
brk(NULL)                               = 0x55b222b07000 <0.000080>
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffd1758c950) = -1 EINVAL (Invalid argument) <0.000051>
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory) <0.000083>
......