perf: Inline enabled check in Logger (#2823)

Author: cijothomas

opentelemetry-sdk/benches/log_enabled.rs

@@ -5,10 +5,12 @@
     Total Number of Cores:   14 (10 performance and 4 efficiency)
     | Test                                         | Average time|
     |---------------------------------------------|-------------|
-    | exporter_disabled_concurrent_processor      |  1.9 ns     |
-    | exporter_disabled_simple_processor          |  5.0 ns     |
+    | exporter_disabled_concurrent_processor      |  1.0 ns     |
+    | exporter_disabled_simple_processor          |  4.5 ns     |
 */
 
+// cargo bench --bench log_enabled --features="spec_unstable_logs_enabled,experimental_logs_concurrent_log_processor"
+
 use criterion::{criterion_group, criterion_main, Criterion};
 use opentelemetry::logs::{Logger, LoggerProvider};
 use opentelemetry_sdk::error::OTelSdkResult;

opentelemetry-sdk/src/logs/logger.rs

@@ -50,6 +50,7 @@ impl opentelemetry::logs::Logger for SdkLogger {
     }
 
     #[cfg(feature = "spec_unstable_logs_enabled")]
+    #[inline]
     fn event_enabled(&self, level: Severity, target: &str, name: Option<&str>) -> bool {
         self.provider
             .log_processors()