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...lost in an instant! function Know yourengines velocity2011

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...lost in an instant!
function f() { 80
var sum = 0;
for (var i = 0; i < N; ++i) {
sum += i; 60
}
} 40


20

function f() {
eval(“”); 0
without eval with eval
var sum = 0;
for (var i = 0; i < N; ++i) {
sum += i; with eval(“”) up to
}
} 10x slower!

...lost in an instant!
function f() { 80
var sum = 0;
for (var i = 0; i < N; ++i) {
sum += i; 60
}
} 40


20

function f() {
eval(“”); 0
without eval with eval
var sum = 0;
for (var i = 0; i < N; ++i) {
sum += i; with eval(“”) up to
}
} 10x slower!

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Editor's Notes

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  • JavaScript now runs 10-100x faster than 5 years ago, fast on all major browsers\nDevelopers using it for new apps: interactive movies, games, photo editing, slides\nI&amp;#x2019;m going to explain how it works to help you get the most out of these engines\n
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