name      old time/op    new time/op    delta
FsTail-4     166µs ± 0%     107µs ± 1%  -35.54%  (p=0.008 n=5+5)

name      old alloc/op   new alloc/op   delta
FsTail-4    28.1kB ± 0%    12.6kB ± 0%  -54.95%  (p=0.008 n=5+5)

name      old allocs/op  new allocs/op  delta
FsTail-4       671 ± 0%        78 ± 0%  -88.38%  (p=0.008 n=5+5)