perf: Add more specific spans to getBusyTimes (#17437)

* perf: Add more specific spans to getBusyTimes

* fix types

packages/core/getBusyTimes.ts

@@ -1,5 +1,6 @@
 import type { Booking, EventType } from "@prisma/client";
 import { Prisma } from "@prisma/client";
+import * as Sentry from "@sentry/nextjs";
 
 import { getBusyCalendarTimes } from "@calcom/core/CalendarManager";
 import dayjs from "@calcom/dayjs";
@@ -110,6 +111,7 @@ export async function getBusyTimes(params: {
   let bookings = params.currentBookings;
 
   if (!bookings) {
+    const getBookingsForBusyTimesSpan = Sentry.startInactiveSpan({ name: "getBookingsForBusyTimes" });
     const bookingsSelect = Prisma.validator<Prisma.BookingSelect>()({
       id: true,
       uid: true,
@@ -180,6 +182,8 @@ export async function getBusyTimes(params: {
     ]);
 
     bookings = [...resultOne, ...resultTwo, ...(resultThree ?? [])];
+
+    getBookingsForBusyTimesSpan.end();
   }
 
   const bookingSeatCountMap: { [x: string]: number } = {};
@@ -249,6 +253,8 @@ export async function getBusyTimes(params: {
       })
     );
 
+    const openSeatsDateRangesSpan = Sentry.startInactiveSpan({ name: "openSeatsDateRanges" });
+
     const openSeatsDateRanges = Object.keys(bookingSeatCountMap).map((key) => {
       const [start, end] = key.split("<>");
       return {
@@ -257,6 +263,8 @@ export async function getBusyTimes(params: {
       };
     });
 
+    openSeatsDateRangesSpan.end();
+
     if (rescheduleUid) {
       const originalRescheduleBooking = bookings.find((booking) => booking.uid === rescheduleUid);
       // calendar busy time from original rescheduled booking should not be blocked
@@ -268,6 +276,7 @@ export async function getBusyTimes(params: {
       }
     }
 
+    const finalizeBusyTimesSpan = Sentry.startInactiveSpan({ name: "finalizeBusyTimes" });
     const result = subtract(
       calendarBusyTimes.map((value) => ({
         ...value,
@@ -285,6 +294,8 @@ export async function getBusyTimes(params: {
       }))
     );
 
+    finalizeBusyTimesSpan.end();
+
     /*
     // TODO: Disabled until we can filter Zoom events by date. Also this is adding too much latency.
     const videoBusyTimes = (await getBusyVideoTimes(credentials)).filter(notEmpty);