Mercurial > lbo > hg > leveldb-rs
view src/infolog.rs @ 387:2ac6eedcc9dc
db_impl: Use a BufWriter inside LogWriter
Unbuffered write-a-lot with 32768 entries written, first four iterations on a new DB:
usr=0.32 sys=0.12 elap=0.46
usr=0.47 sys=0.12 elap=0.60
usr=0.59 sys=0.11 elap=0.72
usr=0.50 sys=0.15 elap=0.67
Buffered write-a-lot with 32768 entries written, first four iterations on a new DB:
usr=0.22 sys=0.01 elap=0.24 (delta = -0.1/-0.11/-0.22)
usr=0.43 sys=0.03 elap=0.48 (delta = -0.04/-0.09/-0.12)
usr=0.54 sys=0.05 elap=0.62 (delta = -0.05/-0.06/-0.1)
usr=0.42 sys=0.03 elap=0.47 (delta = (-0.08/-0.12/-0.2)
author | Lewin Bormann <lbo@spheniscida.de> |
---|---|
date | Mon, 09 Oct 2017 05:51:43 +0000 |
parents | 7cd36dae08dd |
children | 9f01a2fbcda2 |
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use std::io::{self, Write}; pub struct Logger(pub Box<Write>); pub fn stderr() -> Logger { Logger(Box::new(io::stderr())) } #[macro_export] macro_rules! log { ($l:expr) => ($l.as_ref().map(|l| l.borrow_mut().0.write("\n".as_bytes()).is_ok())); ($l:expr, $fmt:expr) => ( $l.as_ref().map(|l| l.borrow_mut().0.write(concat!($fmt, "\n").as_bytes()).is_ok())); ($l:expr, $fmt:expr, $($arg:tt)*) => ( $l.as_ref().map( |l| l.borrow_mut().0.write_fmt(format_args!(concat!($fmt, "\n"), $($arg)*)).is_ok())); }