diff --git a/Concurrency/BestEffortUpdater.cpp b/Concurrency/BestEffortUpdater.cpp
index 716303ca5..99f706a1c 100644
--- a/Concurrency/BestEffortUpdater.cpp
+++ b/Concurrency/BestEffortUpdater.cpp
@@ -13,15 +13,20 @@
 using namespace Concurrency;
 
 void BestEffortUpdater::update() {
+	// Perform an update only if one is not currently ongoing.
 	if(!update_is_ongoing_.test_and_set()) {
 		async_task_queue_.enqueue([this]() {
+			// Get time now using the highest-resolution clock provided by the implementation, and determine
+			// the duration since the last time this section was entered.
 			std::chrono::time_point<std::chrono::high_resolution_clock> now = std::chrono::high_resolution_clock::now();
 			auto elapsed = now - previous_time_point_;
 			previous_time_point_ = now;
 
 			if(has_previous_time_point_) {
-				int64_t timestamp = std::chrono::duration_cast<std::chrono::nanoseconds>(elapsed).count();
-				double cycles = ((timestamp * clock_rate_) / 1e9) + error_;
+				// If the duration is valid, convert it to integer cycles, maintaining a rolling error and call the delegate
+				// if there is one.
+				int64_t duration = std::chrono::duration_cast<std::chrono::nanoseconds>(elapsed).count();
+				double cycles = ((static_cast<double>(duration) * clock_rate_) / 1e9) + error_;
 				error_ = fmod(cycles, 1.0);
 
 				if(delegate_) {
@@ -32,6 +37,7 @@ void BestEffortUpdater::update() {
 				has_previous_time_point_ = true;
 			}
 
+			// Allow furthers updates to occur.
 			update_is_ongoing_.clear();
 		});
 	} else {
diff --git a/Concurrency/BestEffortUpdater.hpp b/Concurrency/BestEffortUpdater.hpp
index 33b267bbb..9157723d6 100644
--- a/Concurrency/BestEffortUpdater.hpp
+++ b/Concurrency/BestEffortUpdater.hpp
@@ -20,6 +20,8 @@ namespace Concurrency {
 	Accepts timing cues from multiple threads and ensures that a delegate receives calls to total
 	a certain number of cycles per second, that those calls are strictly serialised, and that no
 	backlog of calls accrues.
+
+	No guarantees about the thread that the delegate will be called on are made.
 */
 class BestEffortUpdater {
 	public: