0 == "0"
Average time: 1.71428203583E-6

0 == 0
Average time: 1.62786960602E-6

0 === 0
Average time: 1.61648273468E-6

count() == "0"
Average time: 1.95611000061E-6

count() == 0
Average time: 1.89051628113E-6

count() === 0
Average time: 1.86801433563E-6

isset()
Average time: 1.59626722336E-6

isset() == true
Average time: 1.60080909729E-6

isset() === true
Average time: 1.59589529037E-6