From 6b585eec4de6d7552f5696d07e3fc60c9e6b12a7 Mon Sep 17 00:00:00 2001
From: DaniPopes <57450786+DaniPopes@users.noreply.github.com>
Date: Sat, 28 Mar 2026 20:02:08 +0100
Subject: [PATCH] perf: use FastInstant for remaining metrics timing

Replace std::time::Instant with quanta-based FastInstant (TSC on x86)
in metrics and timing code that was still using the slower
clock_gettime syscall.
---
 crates/cli/commands/src/db/checksum/rocksdb.rs                 | 3 ++-
 crates/cli/commands/src/download/manifest_cmd.rs               | 3 ++-
 crates/cli/commands/src/stage/run.rs                           | 3 ++-
 .../tree/src/tree/payload_processor/preserved_sparse_trie.rs   | 3 ++-
 crates/net/network/src/metrics.rs                              | 2 +-
 crates/rpc/rpc-builder/src/metrics.rs                          | 2 +-
 6 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/crates/cli/commands/src/db/checksum/rocksdb.rs b/crates/cli/commands/src/db/checksum/rocksdb.rs
index b30ddb87cf9..d2d06d72511 100644
--- a/crates/cli/commands/src/db/checksum/rocksdb.rs
+++ b/crates/cli/commands/src/db/checksum/rocksdb.rs
@@ -8,8 +8,9 @@ use reth_db::{tables, DatabaseEnv};
 use reth_db_api::table::Table;
 use reth_db_common::DbTool;
 use reth_node_builder::NodeTypesWithDBAdapter;
+use reth_primitives_traits::FastInstant as Instant;
 use reth_provider::RocksDBProviderFactory;
-use std::{hash::Hasher, time::Instant};
+use std::hash::Hasher;
 use tracing::info;
 
 /// RocksDB tables that can be checksummed.
diff --git a/crates/cli/commands/src/download/manifest_cmd.rs b/crates/cli/commands/src/download/manifest_cmd.rs
index 0dcdca1504e..acd8509ce8b 100644
--- a/crates/cli/commands/src/download/manifest_cmd.rs
+++ b/crates/cli/commands/src/download/manifest_cmd.rs
@@ -3,9 +3,10 @@ use clap::Parser;
 use eyre::{Result, WrapErr};
 use reth_db::{mdbx::DatabaseArguments, open_db_read_only, tables, Database};
 use reth_db_api::transaction::DbTx;
+use reth_primitives_traits::FastInstant as Instant;
 use reth_stages_types::StageId;
 use reth_static_file_types::DEFAULT_BLOCKS_PER_STATIC_FILE;
-use std::{path::PathBuf, time::Instant};
+use std::path::PathBuf;
 use tracing::{info, warn};
 
 /// Generate modular chunk archives and a snapshot manifest from a source datadir.
diff --git a/crates/cli/commands/src/stage/run.rs b/crates/cli/commands/src/stage/run.rs
index 9c0c8bbc32f..817849dc216 100644
--- a/crates/cli/commands/src/stage/run.rs
+++ b/crates/cli/commands/src/stage/run.rs
@@ -28,6 +28,7 @@ use reth_node_metrics::{
     server::{MetricServer, MetricServerConfig},
     version::VersionInfo,
 };
+use reth_primitives_traits::FastInstant as Instant;
 use reth_provider::{
     ChainSpecProvider, DBProvider, DatabaseProviderFactory, StageCheckpointReader,
     StageCheckpointWriter,
@@ -40,7 +41,7 @@ use reth_stages::{
     },
     ExecInput, ExecOutput, ExecutionStageThresholds, Stage, StageExt, UnwindInput, UnwindOutput,
 };
-use std::{any::Any, net::SocketAddr, sync::Arc, time::Instant};
+use std::{any::Any, net::SocketAddr, sync::Arc};
 use tokio::sync::watch;
 use tracing::*;
 
diff --git a/crates/engine/tree/src/tree/payload_processor/preserved_sparse_trie.rs b/crates/engine/tree/src/tree/payload_processor/preserved_sparse_trie.rs
index bfc3430fc61..fc830a4b359 100644
--- a/crates/engine/tree/src/tree/payload_processor/preserved_sparse_trie.rs
+++ b/crates/engine/tree/src/tree/payload_processor/preserved_sparse_trie.rs
@@ -2,8 +2,9 @@
 
 use alloy_primitives::B256;
 use parking_lot::Mutex;
+use reth_primitives_traits::FastInstant as Instant;
 use reth_trie_sparse::{ConfigurableSparseTrie, SparseStateTrie};
-use std::{sync::Arc, time::Instant};
+use std::sync::Arc;
 use tracing::debug;
 
 /// Type alias for the sparse trie type used in preservation.
diff --git a/crates/net/network/src/metrics.rs b/crates/net/network/src/metrics.rs
index 1b3fdbfaa46..fbbebaddc93 100644
--- a/crates/net/network/src/metrics.rs
+++ b/crates/net/network/src/metrics.rs
@@ -293,7 +293,7 @@ pub struct TransactionFetcherMetrics {
 #[macro_export]
 macro_rules! duration_metered_exec {
     ($code:expr, $acc:expr) => {{
-        let start = std::time::Instant::now();
+        let start = reth_primitives_traits::FastInstant::now();
 
         let res = $code;
 
diff --git a/crates/rpc/rpc-builder/src/metrics.rs b/crates/rpc/rpc-builder/src/metrics.rs
index 56bb9a313c9..5bd2ab23f2f 100644
--- a/crates/rpc/rpc-builder/src/metrics.rs
+++ b/crates/rpc/rpc-builder/src/metrics.rs
@@ -8,13 +8,13 @@ use reth_metrics::{
     metrics::{Counter, Histogram},
     Metrics,
 };
+use reth_primitives_traits::FastInstant as Instant;
 use std::{
     collections::HashMap,
     future::Future,
     pin::Pin,
     sync::Arc,
     task::{Context, Poll},
-    time::Instant,
 };
 use tower::Layer;