Fastresume CLI option

Makefile

@@ -20,7 +20,7 @@ devserver:
 	echo -n '' > /tmp/rqbit-log && cargo run -- \
 		--log-file /tmp/rqbit-log \
 		--log-file-rust-log=debug,librqbit=trace \
-		server start /tmp/scratch/
+		server start --fastresume /tmp/scratch/
 
 @PHONY: devserver
 devserver-postgres:

crates/librqbit/src/torrent_state/live/mod.rs

@@ -152,7 +152,7 @@ impl TorrentStateLocked {
         if self.unflushed_bitv_bytes == 0 {
             return;
         }
-
+        trace!("trying to flush bitfield");
         if let Some(Err(e)) = self
             .chunks
             .as_mut()

crates/rqbit/src/main.rs

@@ -143,6 +143,10 @@ struct ServerStartOptions {
     /// The folder to store session data in. By default uses OS specific folder.
     #[arg(long = "persistence-config")]
     persistence_config: Option<String>,
+
+    /// [Experimental] if set, will try to resume quickly after restart and skip checksumming.
+    #[arg(long = "fastresume")]
+    fastresume: bool,
 }
 
 #[derive(Parser)]
@@ -422,6 +426,8 @@ async fn async_main(opts: Opts) -> anyhow::Result<()> {
                     }
                 }
 
+                sopts.fastresume = start_opts.fastresume;
+
                 let session =
                     Session::new_with_opts(PathBuf::from(&start_opts.output_folder), sopts)
                         .await