performance_tests: better stats, and keep track of timing history

1 files changed, 58 insertions, 0 deletions

diff --git a/contrib/epee/include/stats.h b/contrib/epee/include/stats.h
new file mode 100644
index 000000000..1cf9c68fb
--- /dev/null
+++ b/contrib/epee/include/stats.h
@@ -0,0 +1,58 @@
+#pragma once
+
+#include <vector>
+
+template<typename T, typename Tpod = T>
+class Stats
+{
+public:
+  Stats(const std::vector<T> &v): values(v), cached(0) {}
+  ~Stats() {}
+
+  size_t get_size() const;
+  Tpod get_min() const;
+  Tpod get_max() const;
+  Tpod get_median() const;
+  double get_mean() const;
+  double get_confidence_interval_95() const;
+  double get_confidence_interval_99() const;
+  double get_standard_deviation() const;
+  double get_standard_error() const;
+  double get_variance() const;
+  double get_kurtosis() const;
+  double get_non_parametric_skew() const;
+  double get_t_test(T t) const;
+  double get_t_test(size_t npoints, double mean, double stddev) const;
+  double get_t_test(const Stats<T> &other) const;
+  double get_z_test(const Stats<T> &other) const;
+  double get_test(const Stats<T> &other) const;
+  std::vector<Tpod> get_quantiles(unsigned int quantiles) const;
+  std::vector<size_t> get_bins(unsigned int bins) const;
+  bool is_same_distribution_95(size_t npoints, double mean, double stddev) const;
+  bool is_same_distribution_95(const Stats<T> &other) const;
+  bool is_same_distribution_99(size_t npoints, double mean, double stddev) const;
+  bool is_same_distribution_99(const Stats<T> &other) const;
+
+  double get_cdf95(size_t df) const;
+  double get_cdf95(const Stats<T> &other) const;
+  double get_cdf99(size_t df) const;
+  double get_cdf99(const Stats<T> &other) const;
+
+private:
+  inline bool is_cached(int bit) const;
+  inline void set_cached(int bit) const;
+
+  const std::vector<T> &values;
+
+  mutable uint64_t cached;
+  mutable Tpod min;
+  mutable Tpod max;
+  mutable Tpod median;
+  mutable double mean;
+  mutable double standard_deviation;
+  mutable double standard_error;
+  mutable double variance;
+  mutable double kurtosis;
+};
+
+#include "stats.inl"