我知道使用tail -c +N，但它非常慢，并且固定了一个 CPU 核心：
leijurvs-MacBook-Pro:Downloads leijurv$ time cat /dev/zero | head -c 100000000 | shasum -a 256
a993f8c574e0fea8c1cdcbcd9408d9e2e107ee6e4d120edcfa11decd53fa0cae -
cat /dev/zero 0.00s user 0.02s system 4% cpu 0.471 total
head -c 100000000 0.01s user 0.03s system 9% cpu 0.470 total
shasum -a 256 0.45s user 0.02s system 99% cpu 0.469 total
leijurvs-MacBook-Pro:Downloads leijurv$ time cat /dev/zero | head -c 100000000 | tail -c +2 | shasum -a 256
f4be792b71a024a60d77b3ac4c1c2b88ac51480fa25f88d10865827f8c086506 -
cat /dev/zero 0.01s user 0.03s system 0% …