diff --git a/tools/profiler/platform-linux.cc b/tools/profiler/platform-linux.cc
index 2ea2534bdeea..96bd6e8b0511 100644
--- a/tools/profiler/platform-linux.cc
+++ b/tools/profiler/platform-linux.cc
@@ -68,6 +68,7 @@
 #include "mozilla/Mutex.h"
 #include "mozilla/Atomics.h"
 #include "mozilla/LinuxSignal.h"
+#include "mozilla/TimeStamp.h"
 #include "ProfileEntry.h"
 #include "nsThreadUtils.h"
 #include "TableTicker.h"
@@ -101,6 +102,8 @@ pid_t gettid()
 }
 #endif
 
+using namespace mozilla;
+
 /* static */ Thread::tid_t
 Thread::GetCurrentId()
 {
@@ -292,7 +295,10 @@ static void* SignalSender(void* arg) {
 
   int vm_tgid_ = getpid();
 
+  TimeDuration lastSleepOverhead = 0;
+  TimeStamp sampleStart = TimeStamp::Now();
   while (SamplerRegistry::sampler->IsActive()) {
+
     SamplerRegistry::sampler->HandleSaveRequest();
     SamplerRegistry::sampler->DeleteExpiredMarkers();
 
@@ -345,14 +351,13 @@ static void* SignalSender(void* arg) {
       }
     }
 
-    // Convert ms to us and subtract 100 us to compensate delays
-    // occuring during signal delivery.
-    // TODO measure and confirm this.
-    int interval = floor(SamplerRegistry::sampler->interval() * 1000 + 0.5) - 100;
-    if (interval <= 0) {
-      interval = 1;
-    }
-    OS::SleepMicro(interval);
+    TimeStamp targetSleepEndTime = sampleStart + TimeDuration::FromMicroseconds(SamplerRegistry::sampler->interval() * 1000);
+    TimeStamp beforeSleep = TimeStamp::Now();
+    TimeDuration targetSleepDuration = targetSleepEndTime - beforeSleep;
+    double sleepTime = std::max(0.0, (targetSleepDuration - lastSleepOverhead).ToMicroseconds());
+    OS::SleepMicro(sleepTime);
+    sampleStart = TimeStamp::Now();
+    lastSleepOverhead = sampleStart - (beforeSleep + TimeDuration::FromMicroseconds(sleepTime));
   }
   return 0;
 }
diff --git a/tools/profiler/platform-macos.cc b/tools/profiler/platform-macos.cc
index bcd91f76130e..ee5cf6010c7a 100644
--- a/tools/profiler/platform-macos.cc
+++ b/tools/profiler/platform-macos.cc
@@ -35,6 +35,7 @@
 #include "platform.h"
 #include "TableTicker.h"
 #include "UnwinderThread2.h"  /* uwt__register_thread_for_profiling */
+#include "mozilla/TimeStamp.h"
 
 // Memory profile
 #include "nsMemoryReporterManager.h"
@@ -202,6 +203,8 @@ class SamplerThread : public Thread {
 
   // Implement Thread::Run().
   virtual void Run() {
+    TimeDuration lastSleepOverhead = 0;
+    TimeStamp sampleStart = TimeStamp::Now();
     while (SamplerRegistry::sampler->IsActive()) {
       SamplerRegistry::sampler->DeleteExpiredMarkers();
       if (!SamplerRegistry::sampler->IsPaused()) {
@@ -231,7 +234,14 @@ class SamplerThread : public Thread {
           isFirstProfiledThread = false;
         }
       }
-      OS::SleepMicro(intervalMicro_);
+
+      TimeStamp targetSleepEndTime = sampleStart + TimeDuration::FromMicroseconds(intervalMicro_);
+      TimeStamp beforeSleep = TimeStamp::Now();
+      TimeDuration targetSleepDuration = targetSleepEndTime - beforeSleep;
+      double sleepTime = std::max(0.0, (targetSleepDuration - lastSleepOverhead).ToMicroseconds());
+      OS::SleepMicro(sleepTime);
+      sampleStart = TimeStamp::Now();
+      lastSleepOverhead = sampleStart - (beforeSleep + TimeDuration::FromMicroseconds(sleepTime));
     }
   }