Ruby vs JS vs Lua (all nonlinear, but JS has best perf)

ruby_and_js_vs_lua.sh

# Code from this tweet: https://twitter.com/josh_cheek/status/1150035017319497728

$ node -e '
const n     = 10000
const str   = "x=" + "x".repeat(n)
const regex = /.*.*=.*/
const label = `n=${n}`
console.time(label)
const match = str.match(regex)
console.timeEnd(label)
console.log("  ", { match: !!match })
'

ruby -e '
n     = 10_000
str   = "x=" + "x"*n
regex = /.*.*=.*/
start = Time.now
match = str.match? regex
dur   = Time.now - start
p n: n, match: match, seconds: dur
'

lua -e '
local n = 10000
local str   = "x=" .. string.rep("x", n)
local regex = ".*.*=.*"
local start = os.clock()
local match = string.match(str, regex)
print("n="..n, os.clock()-start, match ~= nil)
'