diff --git a/lighthouse-core/lib/page-functions.js b/lighthouse-core/lib/page-functions.js
index b674e0d60db7..d3be4d512d84 100644
--- a/lighthouse-core/lib/page-functions.js
+++ b/lighthouse-core/lib/page-functions.js
@@ -149,7 +149,7 @@ function ultradumbBenchmark() {
   }
 
   const durationInSeconds = (Date.now() - start) / 1000;
-  return iterations / durationInSeconds;
+  return Math.round(iterations / durationInSeconds);
 }
 
 module.exports = {
diff --git a/proto/lighthouse-result.proto b/proto/lighthouse-result.proto
index 73c0c536edfe..98049b2e349b 100644
--- a/proto/lighthouse-result.proto
+++ b/proto/lighthouse-result.proto
@@ -69,7 +69,7 @@ message LighthouseResult {
     string host_user_agent = 2;
 
     // The benchmark index that indicates rough device class
-    int32 benchmark_index = 3;
+    google.protobuf.DoubleValue benchmark_index = 3;
   }
 
   // The environment that the audit was run in
@@ -110,7 +110,7 @@ message LighthouseResult {
     repeated string output = 1;
 
     // The maximum amount of time to wait for loading in ms
-    int32 max_wait_for_load = 2;
+    google.protobuf.DoubleValue max_wait_for_load = 2;
 
     // Network throttling options
     enum ThrottlingMethod {
@@ -133,7 +133,7 @@ message LighthouseResult {
     // Message containing the throttling settings used in an LH configuration
     message Throttling {
       // The round trip time in ms
-      int32 rtt_ms = 1;
+      google.protobuf.DoubleValue rtt_ms = 1;
 
       // The throughput in kilobytes per second
       google.protobuf.DoubleValue throughput_kbps = 2;
@@ -148,7 +148,7 @@ message LighthouseResult {
       google.protobuf.DoubleValue upload_throughput_kbps = 5;
 
       // The amount of slowdown to apply to the cpu
-      int32 cpu_slowdown_multiplier = 6;
+      google.protobuf.DoubleValue cpu_slowdown_multiplier = 6;
     }
 
     // The throttling settings used
diff --git a/proto/sample_v2_round_trip.json b/proto/sample_v2_round_trip.json
index 9f844dfc8205..8542cf721077 100644
--- a/proto/sample_v2_round_trip.json
+++ b/proto/sample_v2_round_trip.json
@@ -3244,7 +3244,7 @@
         "extraHeaders": null, 
         "gatherMode": false, 
         "locale": "en-US", 
-        "maxWaitForLoad": 45000, 
+        "maxWaitForLoad": 45000.0, 
         "onlyAudits": null, 
         "onlyCategories": null, 
         "output": [
@@ -3252,17 +3252,17 @@
         ], 
         "skipAudits": null, 
         "throttling": {
-            "cpuSlowdownMultiplier": 4, 
+            "cpuSlowdownMultiplier": 4.0, 
             "downloadThroughputKbps": 1474.5600000000002, 
             "requestLatencyMs": 562.5, 
-            "rttMs": 150, 
+            "rttMs": 150.0, 
             "throughputKbps": 1638.4, 
             "uploadThroughputKbps": 675.0
         }, 
         "throttlingMethod": "devtools"
     }, 
     "environment": {
-        "benchmarkIndex": 1000, 
+        "benchmarkIndex": 1000.0, 
         "hostUserAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3358.0 Safari/537.36", 
         "networkUserAgent": "Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5 Build/MRA58N) AppleWebKit/537.36(KHTML, like Gecko) Chrome/66.0.3359.30 Mobile Safari/537.36"
     },