export function captureBreakdown()

in packages/rum-core/src/performance-monitoring/breakdown.js [154:200]

• 39 lines of code
• 7 McCabe index (conditional complexity)

export function captureBreakdown(transaction, timings = PERF.timing) {
  const breakdowns = []
  const { name, type, sampled } = transaction
  const transactionDetails = { name, type }

  /**
   * Capture breakdown metrics only for sampled transactions
   */
  if (!sampled) {
    return breakdowns
  }

  if (type === PAGE_LOAD && timings) {
    for (let i = 0; i < pageLoadBreakdowns.length; i++) {
      const current = pageLoadBreakdowns[i]
      const start = timings[current[0]]
      const end = timings[current[1]]
      const duration = getDuration(start, end)
      if (duration === 0 || duration == null) {
        continue
      }
      breakdowns.push(
        getSpanBreakdown(transactionDetails, {
          details: { type: current[2] },
          duration
        })
      )
    }
  } else {
    /**
     * Construct the breakdown timings based on span types
     */
    const spanMap = groupSpans(transaction)
    Object.keys(spanMap).forEach(key => {
      const [type, subtype] = key.split('.')
      const { duration, count } = spanMap[key]
      breakdowns.push(
        getSpanBreakdown(transactionDetails, {
          details: { type, subtype },
          duration,
          count
        })
      )
    })
  }
  return breakdowns
}