[SLG-0006]: task-local logger implementation

Benchmarks/MaxLogLevelNone/Thresholds/Xcode swift 6.3/MaxLogLevelNone.critical_log_with_critical_log_level.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 658,
+  "instructions" : 734,
   "objectAllocCount" : 0
-}
+}

Benchmarks/MaxLogLevelNone/Thresholds/Xcode swift 6.3/MaxLogLevelNone.critical_log_with_critical_log_level_generic.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 658,
+  "instructions" : 734,
   "objectAllocCount" : 0
-}
+}

Benchmarks/MaxLogLevelNone/Thresholds/Xcode swift 6.3/MaxLogLevelNone.critical_log_with_critical_log_level_logLevel_set.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 658,
+  "instructions" : 734,
   "objectAllocCount" : 0
-}
+}

Benchmarks/MaxLogLevelNone/Thresholds/Xcode swift 6.3/MaxLogLevelNone.critical_log_with_critical_log_level_metadata_set.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 658,
+  "instructions" : 759,
   "objectAllocCount" : 0
-}
+}

Benchmarks/MaxLogLevelWarning/Thresholds/Xcode swift 6.3/MaxLogLevelWarning.notice_log_with_notice_log_level.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 662,
+  "instructions" : 734,
   "objectAllocCount" : 0
-}
+}

Benchmarks/MaxLogLevelWarning/Thresholds/Xcode swift 6.3/MaxLogLevelWarning.notice_log_with_notice_log_level_attributed_generic.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 662,
+  "instructions" : 734,
   "objectAllocCount" : 0
-}
+}

Benchmarks/MaxLogLevelWarning/Thresholds/Xcode swift 6.3/MaxLogLevelWarning.notice_log_with_notice_log_level_generic.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 658,
+  "instructions" : 734,
   "objectAllocCount" : 0
-}
+}

Benchmarks/MaxLogLevelWarning/Thresholds/Xcode swift 6.3/MaxLogLevelWarning.warning_log_with_warning_log_level.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 1892,
+  "instructions" : 1993,
   "objectAllocCount" : 0
-}
+}

Benchmarks/MaxLogLevelWarning/Thresholds/Xcode swift 6.3/MaxLogLevelWarning.warning_log_with_warning_log_level_generic.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 1892,
+  "instructions" : 1968,
   "objectAllocCount" : 0
-}
+}

Benchmarks/NoTraits/Benchmarks/NoTraitsBenchmarks/NoTraits.swift

@@ -18,12 +18,38 @@ import Foundation
 import Logging
 
 public let benchmarks: @Sendable () -> Void = {
+
     makeBenchmark(loggerLevel: .error, logLevel: .error, "_generic") { logger in
         logger.log(level: .error, "hello, benchmarking world")
     }
     makeBenchmark(loggerLevel: .error, logLevel: .debug, "_generic") { logger in
         logger.log(level: .debug, "hello, benchmarking world")
     }
+
+    // MARK: - Task-local logger benchmarks
+
+    makeBenchmark(loggerLevel: .error, logLevel: .error, "_current_read_fallback") { _ in
+        blackHole(Logger.current)
+    }
+
+    makeBenchmark(loggerLevel: .error, logLevel: .error, setScopedLogger: true, "_current_read_inside_scope") {
+        logger in
+        blackHole(Logger.current)
+    }
+
+    makeBenchmark(loggerLevel: .error, logLevel: .error, setScopedLogger: true, "_withLogger_mergingMetadata") {
+        logger in
+        withLogger(mergingMetadata: ["key": "value"]) { inner in
+            blackHole(inner)
+        }
+    }
+
+    makeBenchmark(loggerLevel: .error, logLevel: .error, setScopedLogger: true, "_withLogger_handler") { logger in
+        withLogger(handler: logger.handler) { inner in
+            blackHole(inner)
+        }
+    }
+
     makeBenchmark(loggerLevel: .error, logLevel: .error, "_1_attribute") { logger in
         logger.log(
             level: .error,

Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.debug_log_with_error_log_level_1_attribute.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 985,
+  "instructions" : 1050,
   "objectAllocCount" : 0
-}
+}

Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.debug_log_with_error_log_level_2_attributes.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 985,
+  "instructions" : 1050,
   "objectAllocCount" : 0
-}
+}

Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.debug_log_with_error_log_level_generic.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 970,
+  "instructions" : 1046,
   "objectAllocCount" : 0
-}
+}

Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.error_log_with_error_log_level_1_attribute.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 5855,
+  "instructions" : 5935,
   "objectAllocCount" : 2
-}
+}

Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.error_log_with_error_log_level_2_attributes.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 7075,
+  "instructions" : 7151,
   "objectAllocCount" : 3
-}
+}

Benchmarks/MaxLogLevelNone/Thresholds/Xcode swift 6.3/NoTraits.debug_log_with_error_log_level_1_attribute.p90.json → Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.error_log_with_error_log_level_current_read_fallback.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 970,
+  "instructions" : 1005,
   "objectAllocCount" : 0
-}
+}

Benchmarks/MaxLogLevelNone/Thresholds/Xcode swift 6.3/NoTraits.debug_log_with_error_log_level_2_attributes.p90.json → Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.error_log_with_error_log_level_current_read_inside_scope.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 970,
+  "instructions" : 1017,
   "objectAllocCount" : 0
-}
+}

Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.error_log_with_error_log_level_generic.p90.json

@@ -1,4 +1,4 @@
 {
-  "instructions" : 1890,
+  "instructions" : 1966,
   "objectAllocCount" : 0
-}
+}

Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.error_log_with_error_log_level_withLogger_handler.p90.json

@@ -0,0 +1,4 @@
+{
+  "instructions" : 4551,
+  "objectAllocCount" : 1
+}

Benchmarks/NoTraits/Thresholds/Xcode swift 6.3/NoTraits.error_log_with_error_log_level_withLogger_mergingMetadata.p90.json

@@ -0,0 +1,4 @@
+{
+  "instructions" : 9623,
+  "objectAllocCount" : 4
+}

Benchmarks/Sources/BenchmarksFactory/MakeBenchmark.swift

@@ -19,6 +19,7 @@ import Logging
 public func makeBenchmark(
     loggerLevel: Logger.Level,
     logLevel: Logger.Level,
+    setScopedLogger: Bool = false,
     _ suffix: String = "",
     _ body: @escaping (Logger) -> Void
 ) {
@@ -49,7 +50,17 @@ public func makeBenchmark(
                 ),
             ]
         )
-    ) { _ in
-        body(logger)
+    ) { benchmark in
+        if setScopedLogger {
+            withLogger(logger) { logger in
+                benchmark.startMeasurement()
+                body(logger)
+                benchmark.stopMeasurement()
+            }
+        } else {
+            benchmark.startMeasurement()
+            body(logger)
+            benchmark.stopMeasurement()
+        }
     }
 }