sampling.js

/**
Enable event sampling. When set to the default of zero, sampling is disabled and all events are sent back to LaunchDarkly. 
When set to greater than zero, there is a 1 in samplingInterval chance events will be will be sent.

Example: if you want 5% sampling rate, set samplingInterval to 20.
**/
var ldclient = LDClient.initialize('YOUR_CLIENT_SIDE_ID', user, options = {
  samplingInterval: 20
});