Add 99th percentile

library/src/agent/InspectionStatistics.test.ts

@@ -30,6 +30,7 @@ t.test("it keeps track of amount of calls", async () => {
         75: 0.1,
         90: 0.1,
         95: 0.1,
+        99: 0.1,
       },
     },
   });
@@ -51,6 +52,7 @@ t.test("it keeps track of amount of calls", async () => {
         75: 0.1,
         90: 0.1,
         95: 0.1,
+        99: 0.1,
       },
     },
   });
@@ -72,6 +74,7 @@ t.test("it keeps track of amount of calls", async () => {
         75: 0.1,
         90: 0.1,
         95: 0.1,
+        99: 0.1,
       },
     },
   });
@@ -98,6 +101,7 @@ t.test("it keeps track of amount of calls", async () => {
         75: 0.1,
         90: 0.1,
         95: 0.1,
+        99: 0.1,
       },
     },
   });
@@ -124,6 +128,7 @@ t.test("it keeps track of amount of calls", async () => {
         75: 0.3,
         90: 0.3,
         95: 0.3,
+        99: 0.3,
       },
     },
   });

library/src/agent/InspectionStatistics.ts

@@ -53,12 +53,16 @@ export class InspectionStatistics {
       };
 
       if (timings.length > 0) {
-        const [p50, p75, p90, p95] = percentiles([50, 75, 90, 99], timings);
+        const [p50, p75, p90, p95, p99] = percentiles(
+          [50, 75, 90, 95, 99],
+          timings
+        );
         stats[module].percentiles = {
           "50": p50,
           "75": p75,
           "90": p90,
           "95": p95,
+          "99": p99,
         };
       }
     }