Use chrono for duration logic

.clang-format

@@ -0,0 +1,56 @@
+---
+# BasedOnStyle:  LLVM
+AccessModifierOffset: -4
+ConstructorInitializerIndentWidth: 0
+AlignAfterOpenBracket: DontAlign
+AlignEscapedNewlinesLeft: false
+AlignOperands: true
+AlignTrailingComments: true
+AlignConsecutiveAssignments : true
+AlignConsecutiveDeclarations : true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortIfStatementsOnASingleLine: true
+AllowShortCaseLabelsOnASingleLine: true
+AllowShortLoopsOnASingleLine: false
+AllowShortBlocksOnASingleLine: true
+AlwaysBreakTemplateDeclarations: false
+AlwaysBreakBeforeMultilineStrings: false
+BreakBeforeBinaryOperators: false
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: true
+BinPackParameters: false
+BinPackArguments: false
+ColumnLimit: 0
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerBinding: false
+ExperimentalAutoDetectBinPacking: false
+IndentCaseLabels: false
+Language: Cpp
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 60
+PenaltyBreakString: 1000
+PenaltyBreakFirstLessLess: 120
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Left
+PointerBindsToType: true
+SpacesBeforeTrailingComments: 1
+Standard: Cpp11
+IndentWidth: 4
+TabWidth: 4
+UseTab: Never
+BreakBeforeBraces: Allman
+IndentFunctionDeclarationAfterType: false
+SpacesInParentheses: false
+SpacesInAngles: false
+SpaceInEmptyParentheses: false
+SpacesInCStyleCastParentheses: false
+SpaceAfterControlStatementKeyword: true
+SpaceBeforeAssignmentOperators: true
+SortIncludes: true
+...
+

CMakeLists.txt

@@ -29,7 +29,7 @@ include(CPack)
 include(GNUInstallDirs)
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
 option(ENABLE_SHARED "Build shared library" ON)