timing()

Signature

app.timing([options])

Parameters

Name	Type	Description
options	Object	Optional configuration object.
options.headerName	string	Custom header name (default: 'Server-Timing').
options.precision	number	Decimal places for duration in milliseconds (default: 2).

Usage

This middleware tracks the total time taken to process a request and returns it in the response via the Server-Timing header, complying with the W3C specification.

Modern browsers automatically parse this header and display backend execution times in their Network Developer Tools.

Examples

// Default usage
app.timing();

// With 4 decimal places of precision
app.timing({
  precision: 4
});

Response Header

Format:

Server-Timing: total;dur=12.34