JavaScript闭包编译器类型强制性能

Question

编译器在转换为整数的布尔值上表现不佳吗？

/**
 * @type {boolean}
 */
var isFirstCall = true;

handler();
handler();
handler();

function handler () {
    if (isFirstCall --> false) {
        // this runs once; isFirstCall and false were coerced to integers
    }
}