diff --git a/aicirt/src/main.rs b/aicirt/src/main.rs
index 5bb2c87f..4eaaa77b 100644
--- a/aicirt/src/main.rs
+++ b/aicirt/src/main.rs
@@ -398,7 +398,9 @@ impl ModuleRegistry {
 
     fn run_main(&self, req_id: &String) -> Result<()> {
         let req_instances = self.req_instances.lock().unwrap();
-        let inst = req_instances.get(req_id).ok_or_else(|| anyhow!("invalid req_id"))?;
+        let inst = req_instances
+            .get(req_id)
+            .ok_or_else(|| anyhow!("invalid req_id"))?;
         inst.run_main()
     }
 
@@ -715,6 +717,7 @@ impl Stepper {
     }
 
     fn aici_post_process(&mut self, req: AiciPostProcessReq) -> Result<AiciPostProcessResp> {
+        let timing = false;
         let t0 = Instant::now();
 
         // this if forking due to n= parameter in sampling
@@ -727,13 +730,12 @@ impl Stepper {
         let mut used_ids = Vec::new();
         let mut outputs = HashMap::default();
 
-        log::warn!(
-            "post_process0: {:?} {} {}",
-            t0.elapsed(),
-            self.instances.len(),
-            req.ops.len()
-        );
+        let mut all_dur = Vec::new();
+        if timing {
+            all_dur.push(t0.elapsed());
+        }
 
+        let mut prev = Instant::now();
         for op in req.ops.into_iter() {
             let instid = op.id;
             if let Ok(h) = self.get_worker(instid) {
@@ -751,15 +753,15 @@ impl Stepper {
             } else {
                 log::warn!("invalid id {}", instid);
             }
+            if timing {
+                all_dur.push(prev.elapsed());
+                prev = Instant::now();
+            }
         }
 
         let deadline =
             Instant::now() + std::time::Duration::from_millis(self.limits.max_pre_step_ms);
 
-        let mut all_dur = Vec::new();
-        all_dur.push(t0.elapsed());
-
-        let mut prev = Instant::now();
         for id in used_ids {
             let h = self.get_worker(id).unwrap();
             let timeout = deadline.saturating_duration_since(Instant::now());
@@ -769,11 +771,19 @@ impl Stepper {
                 }
                 Err(e) => self.worker_error(id, &mut outputs, e),
             }
-            all_dur.push(prev.elapsed());
-            prev = Instant::now();
+            if timing {
+                all_dur.push(prev.elapsed());
+                prev = Instant::now();
+            }
         }
 
-        log::warn!("post_process: {:?}", all_dur);
+        if timing {
+            log::warn!(
+                "post_process time: {:?} {:?}",
+                t0.elapsed(),
+                all_dur.iter().map(|x| x.as_micros()).collect::<Vec<_>>()
+            );
+        }
 
         Ok(AiciPostProcessResp { seqs: outputs })
     }
@@ -955,7 +965,7 @@ impl CmdRespChannel {
 }
 
 fn bench_hashmap() {
-    let mut h =  HashMap::<u64, u64>::default();
+    let mut h = HashMap::<u64, u64>::default();
     for x in 10..50 {
         h.insert(x, x * x);
     }
diff --git a/harness/bench_server.py b/harness/bench_server.py
index e2d44bae..57deea07 100644
--- a/harness/bench_server.py
+++ b/harness/bench_server.py
@@ -10,7 +10,7 @@
 bench_py = """
 import pyaici.server as aici
 async def main():
-    await aici.gen_tokens(max_tokens=5)
+    await aici.gen_tokens(max_tokens=45)
 aici.start(main())
 """