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Home > @firebase/performance > PerformanceTrace > record

PerformanceTrace.record() method

Records a trace from given parameters. This provides a direct way to use trace without a need to start/stop. This is useful for use cases in which the trace cannot directly be used (e.g. if the duration was captured before the Performance SDK was loaded).

Signature:

record(startTime: number, duration: number, options?: {
        metrics?: {
            [key: string]: number;
        };
        attributes?: {
            [key: string]: string;
        };
    }): void;

Parameters

Parameter Type Description
startTime number trace start time since epoch in millisec.
duration number The duraction of the trace in millisec.
options { metrics?: { [key: string]: number; }; attributes?: { [key: string]: string; }; } An object which can optionally hold maps of custom metrics and custom attributes.

Returns:

void