global: snapshot

crates/brk_computer/src/blocks/compute.rs

@@ -17,12 +17,10 @@ impl Vecs {
         starting_indexes: &Indexes,
         exit: &Exit,
     ) -> Result<()> {
-        // Sequential: time → lookback (dependency chain)
-        self.time
-            .timestamp
-            .compute(indexer, indexes, starting_indexes, exit)?;
-        self.lookback
-            .compute(&self.time, starting_indexes, exit)?;
+        self.db.sync_bg_tasks()?;
+
+        // lookback depends on indexes.timestamp.monotonic
+        self.lookback.compute(indexes, starting_indexes, exit)?;
 
         // Parallel: remaining sub-modules are independent of each other.
         // size depends on lookback (already computed above).
@@ -52,8 +50,11 @@ impl Vecs {
             Ok(())
         })?;
 
-        let _lock = exit.lock();
-        self.db.compact()?;
+        let exit = exit.clone();
+        self.db.run_bg(move |db| {
+            let _lock = exit.lock();
+            db.compact()
+        });
         Ok(())
     }
 }