diff --git a/src/bin/test_chunk_speed2.rs b/src/bin/test_chunk_speed2.rs
new file mode 100644
index 00000000..c5391254
--- /dev/null
+++ b/src/bin/test_chunk_speed2.rs
@@ -0,0 +1,53 @@
+use failure::*;
+use futures::*;
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+extern crate proxmox_backup;
+
+use proxmox_backup::backup::*;
+
+// Test Chunker with real data read from a file.
+//
+// To generate some test input use:
+// # dd if=/dev/urandom of=random-test.dat bs=1M count=1024 iflag=fullblock
+//
+// Note: I can currently get about 830MB/s
+
+fn main() {
+
+    let repeat = std::sync::Arc::new(AtomicUsize::new(0));
+    let repeat2 = repeat.clone();
+
+    let stream_len = std::sync::Arc::new(AtomicUsize::new(0));
+    let stream_len2 = stream_len.clone();
+
+    let task = tokio::fs::File::open("random-test.dat")
+        .map_err(Error::from)
+        .and_then(move |file| {
+            let stream = tokio::codec::FramedRead::new(file, tokio::codec::BytesCodec::new())
+                .map(|bytes| bytes.to_vec()).map_err(Error::from);
+            //let chunk_stream = FixedChunkStream::new(stream, 4*1024*1024);
+            let chunk_stream = ChunkStream::new(stream);
+
+            let start_time = std::time::Instant::now();
+
+            chunk_stream
+                .for_each(move |chunk| {
+                    repeat.fetch_add(1, Ordering::SeqCst);
+                    stream_len.fetch_add(chunk.len(), Ordering::SeqCst);
+                    println!("Got chunk {}", chunk.len());
+                    Ok(())
+                })
+                .and_then(move |_result| {
+                    let repeat = repeat2.load(Ordering::SeqCst);
+                    let stream_len = stream_len2.load(Ordering::SeqCst);
+                    let speed = ((stream_len*1000000)/(1024*1024))/(start_time.elapsed().as_micros() as usize);
+                    println!("Uploaded {} chunks in {} seconds ({} MB/s).", repeat, start_time.elapsed().as_secs(), speed);
+                    println!("Average chunk size was {} bytes.", stream_len/repeat);
+                    println!("time per request: {} microseconds.", (start_time.elapsed().as_micros())/(repeat as u128));
+                    Ok(())
+                })
+        });
+
+    tokio::run(task.map_err(|err| { panic!("ERROR: {}", err); }));
+}