[Lldb-commits] [lldb] [LLDB][Data Formatters] Calculate average and total time for summary providers within lldb (PR #102708)

[Jacob Lalonde via lldb-commits]

================
@@ -174,6 +177,86 @@ struct StatisticsOptions {
   std::optional<bool> m_include_transcript;
 };
 
+/// A class that represents statistics about a TypeSummaryProviders invocations
+class SummaryStatistics {
+public:
+  explicit SummaryStatistics(std::string name, std::string impl_type)
+      : m_total_time(), m_impl_type(impl_type), m_name(name),
+        m_summary_count(0) {}
+
+  std::string GetName() const { return m_name; };
+  double GetTotalTime() const { return m_total_time.get().count(); }
+
+  uint64_t GetSummaryCount() const {
+    return m_summary_count.load(std::memory_order_relaxed);
+  }
+
+  StatsDuration &GetDurationReference() { return m_total_time; };
+
+  std::string GetSummaryKindName() const { return m_impl_type; }
+
+  llvm::json::Value ToJSON() const;
+
+  void IncrementSummaryCount() {
+    m_summary_count.fetch_add(1, std::memory_order_relaxed);
+  }
+
+private:
+  lldb_private::StatsDuration m_total_time;
+  std::string m_impl_type;
+  std::string m_name;
+  std::atomic<uint64_t> m_summary_count;
+};
+
+/// A class that wraps a std::map of SummaryStatistics objects behind a mutex.
+class SummaryStatisticsCache {
+public:
+  /// Basic RAII class to increment the summary count when the call is complete.
+  /// In the future this can be extended to collect information about the
+  /// elapsed time for a single request.
----------------
Jlalond wrote:

Touche, but this should be better worded as 

```
In the future this can be extended to collect information beyond the elapsed time for a single request
```

https://github.com/llvm/llvm-project/pull/102708