Move metrics into its own crate

sdk/src/lib.rs

@@ -2,6 +2,7 @@ pub mod account;
 pub mod loader_instruction;
 pub mod native_program;
 pub mod pubkey;
+pub mod timing;
 
 extern crate bincode;
 extern crate bs58;

sdk/src/timing.rs

@@ -0,0 +1,22 @@
+//! The `timing` module provides std::time utility functions.
+use std::time::Duration;
+use std::time::{SystemTime, UNIX_EPOCH};
+
+pub fn duration_as_us(d: &Duration) -> u64 {
+    (d.as_secs() * 1000 * 1000) + (u64::from(d.subsec_nanos()) / 1_000)
+}
+
+pub fn duration_as_ms(d: &Duration) -> u64 {
+    (d.as_secs() * 1000) + (u64::from(d.subsec_nanos()) / 1_000_000)
+}
+
+pub fn duration_as_s(d: &Duration) -> f32 {
+    d.as_secs() as f32 + (d.subsec_nanos() as f32 / 1_000_000_000.0)
+}
+
+pub fn timestamp() -> u64 {
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .expect("create timestamp in timing");
+    duration_as_ms(&now)
+}