Rate   splice strftime    slice    subst   substr
splice    93974/s       --     -23%     -40%     -49%     -64%
strftime 121619/s      29%       --     -23%     -33%     -53%
slice    157894/s      68%      30%       --     -14%     -40%
subst    182658/s      94%      50%      16%       --     -30%
substr   261283/s     178%     115%      65%      43%       --