feat: implement parallel execution

Cargo.toml

@@ -8,7 +8,7 @@ repository = "https://github.com/flashbots/op-rbuilder"
 exclude = [".github/"]
 
 [workspace]
-members = [ "crates/op-rbuilder", "crates/p2p", "crates/tdx-quote-provider"]
+members = ["crates/op-rbuilder", "crates/p2p", "crates/tdx-quote-provider"]
 default-members = ["crates/op-rbuilder"]
 resolver = "2"
 
@@ -216,4 +216,4 @@ opentelemetry = { version = "0.31", features = ["trace"] }
 
 # Base Path
 concurrent-queue = "2.5.0"
-tips-core = { git = "https://github.com/base/tips", rev = "c08eaa4fe10c26de8911609b41ddab4918698325", default-features = false }
+tips-core = { git = "https://github.com/base/tips", rev = "c08eaa4fe10c26de8911609b41ddab4918698325", default-features = false }

crates/op-rbuilder/Cargo.toml

@@ -91,6 +91,7 @@ op-alloy-flz.workspace = true
 revm.workspace = true
 op-revm.workspace = true
 
+auto_impl.workspace = true
 tracing.workspace = true
 eyre.workspace = true
 serde_with.workspace = true

crates/op-rbuilder/src/args/op.rs

@@ -58,6 +58,11 @@ pub struct OpRbuilderArgs {
     )]
     pub resource_metering_buffer_size: usize,
 
+    /// Number of parallel threads for transaction execution.
+    /// Defaults to the number of available CPU cores.
+    #[arg(long = "builder.parallel-threads", env = "BUILDER_PARALLEL_THREADS")]
+    pub parallel_threads: Option<usize>,
+
     /// Path to builder playgorund to automatically start up the node connected to it
     #[arg(
         long = "builder.playground",