import random, times

var input = newSeq[string]()
for _ in 1..100_000:
    input.add(fromUnix(rand(0..100_000_000)).utc.format("yyyy-MM-dd'T'HH:mm:sszzz"))

block:
    var sum = 0'i64
    let before = getTime()
    for str in input:
        sum += str.parse("yyyy-MM-dd'T'HH:mm:sszzz", utc()).toTime.toUnix
    let delta = getTime() - before
    echo "parse(x, \"yyyy-MM-dd'T'HH:mm:sszzz\", utc())\t",
      delta.milliseconds, " ms"

block:
    var sum = 0'i64
    let before = getTime()
    for str in input:
        sum += str.parse("yyyy-MM-dd'T'HH:mm:sszzz", local()).toTime.toUnix
    let delta = getTime() - before
    echo "parse(x, \"yyyy-MM-dd'T'HH:mm:sszzz\", local())\t",
      delta.milliseconds, " ms"

block:
    let before = getTime()
    var input = newSeq[string]()
    for _ in 1..100_000:
        input.add(fromUnix(rand(0..100_000_000)).utc.format("yyyy-MM-dd'T'HH:mm:sszzz"))
    let delta = getTime() - before
    echo "format(x, \"yyyy-MM-dd'T'HH:mm:sszzz\")\t\t",
      delta.milliseconds, " ms"