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)

#!/bin/bash

KCOV=kcov
KCOV_OPTS="--verify --exclude-pattern=/.cargo"
KCOV_OUT="./kcov-out/"

export RUSTFLAGS="-C link-dead-code"

TEST_BIN=$(cargo test 2>&1 >/dev/null | awk '/^     Running target\/debug\// { print $2 }')

${KCOV} ${KCOV_OPTS} ${KCOV_OUT} ${TEST_BIN} && xdg-open ${KCOV_OUT}/index.html