console

Output to stdout and stderr. Maps directly to printf() and fprintf(stderr, ...).

console.log(value)

Print a value to stdout followed by a newline.

console.log("hello");           // prints: hello
console.log(42);                // prints: 42.000000
console.log(true);              // prints: 1.000000

Multiple arguments are space-separated:

console.log("count:", 42);      // prints: count: 42.000000

console.error(value)

Print a value to stderr followed by a newline.

console.error("something went wrong");

console.time(label)

Start a named timer.

console.time("build");

console.timeEnd(label)

Stop a named timer and print elapsed time in milliseconds.

console.time("build");
// ... do work ...
console.timeEnd("build");    // prints: build: 42.123ms

Native Implementation

API	Maps to
console.log()	printf()
console.error()	fprintf(stderr, ...)
console.time()	uv_hrtime() + global StringMap
console.timeEnd()	uv_hrtime() delta + printf()