From adb320192a91cffcafa0fa1931f4d8db8f412fe9 Mon Sep 17 00:00:00 2001
From: t8y2 <1156263951@qq.com>
Date: Wed, 13 May 2026 16:33:39 +0800
Subject: [PATCH] perf: add JVM flags for faster agent cold start

Use -XX:TieredStopAtLevel=1 and -XX:+UseSerialGC to skip C2
compilation and reduce GC init overhead on agent process startup.
---
 crates/dbx-core/src/db/agent_driver.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/crates/dbx-core/src/db/agent_driver.rs b/crates/dbx-core/src/db/agent_driver.rs
index 2743769a84..efbbcf7351 100644
--- a/crates/dbx-core/src/db/agent_driver.rs
+++ b/crates/dbx-core/src/db/agent_driver.rs
@@ -22,8 +22,7 @@ impl AgentDriverClient {
     /// Blocks (async) until the agent writes `{"ready":true}` to stdout.
     pub async fn spawn(java_path: &str, jar_path: &str) -> Result<Self, String> {
         let mut child = Command::new(java_path)
-            .arg("-jar")
-            .arg(jar_path)
+            .args(["-XX:TieredStopAtLevel=1", "-XX:+UseSerialGC", "-jar", jar_path])
             .stdin(Stdio::piped())
             .stdout(Stdio::piped())
             .stderr(Stdio::inherit())