nim compare files

import algorithm, os

var
  psp: array[100_000_000, string]
  index: int
  file_cur = open("cur.csv")
  file_new = open("new.csv")

index = 0
for line in file_cur.lines:
  psp[index] = line
  index += 1

sort(psp, system.cmp[string])

index = 0
for line in file_new.lines:
  if binarySearch(psp, line) == -1: echo line

file_cur.close()
file_new.close()