text:   Instructions",4,"['New paper by me, @pshufb, @lemire describing the novel positional population count operation using SIMD instructions. <LINK>', 'a) The classic popcount operation computes the number of set bits in a machine word\nb) The positional popcount operation computes the bitwise histogram of an input stream of words https://t.co/SPdSg93qcS', 'Associated code with paper\nhttps://t.co/oJMHOsB6QO', 'Our best approach uses up to 400 times fewer instructions and is up to 50 times faster than baseline code using only regular (non-SIMD) instructions.']",19,11,495