diff options
Diffstat (limited to 'doc/api/tracing.md')
| -rw-r--r-- | doc/api/tracing.md | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/doc/api/tracing.md b/doc/api/tracing.md index 67b3394d55..3a534177a3 100644 --- a/doc/api/tracing.md +++ b/doc/api/tracing.md @@ -10,8 +10,20 @@ starting a Node.js application. The set of categories for which traces are recorded can be specified using the `--trace-event-categories` flag followed by a list of comma separated category -names. By default the `node`, `node.async_hooks`, and `v8` categories are -enabled. +names. + +The available categories are: + +* `node` +* `node.async_hooks` - Enables capture of detailed async_hooks trace data. +* `node.perf` - Enables capture of [Performance API] measurements. + * `node.perf.usertiming` - Enables capture of only Performance API User Timing + measures and marks. + * `node.perf.timerify` - Enables capture of only Performance API timerify + measurements. +* `v8` + +By default the `node`, `node.async_hooks`, and `v8` categories are enabled. ```txt node --trace-events-enabled --trace-event-categories v8,node,node.async_hooks server.js @@ -24,3 +36,5 @@ tab of Chrome. Starting with Node 10.0.0, the tracing system uses the same time source as the one used by `process.hrtime()` however the trace-event timestamps are expressed in microseconds, unlike `process.hrtime()` which returns nanoseconds. + +[Performance API]: perf_hooks.html |