rust-velocity-limit-bufwriter

rust-velocity-limit-bufwriter.rs

let f = File::create(path).expect("Unable to create file");  
+let mut buf = BufWriter::new(f);  

for line in &self.output{                       
  let serialized = serde_json::to_string(&line).unwrap();
  writeln!(&mut buf, "{}", serialized).unwrap();                                                               
}