#!/usr/bin/env bash
# bench.sh — race fastwc against GNU coreutils wc on standard input, fed by
# shell redirect (the same path every real pipeline uses). Counts must agree
# with coreutils' stdin behavior, and fastwc must not be slower.
# Fails fast: the moment fastwc is slower than (or disagrees with) coreutils
# wc, a human readable report is written to FAILED-benchmark.txt and this
# script exits non-zero.
#
# usage: ./bench.sh
set -u

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_DIR="$(cd "$SCRIPT_DIR/../../.." && pwd)"
source "$REPO_DIR/benchmarks/std.sh"

checkfastwc
checkwc
BENCH_NAME="coreutils"

printf 'benchmarking %s wc vs fastwc: stdin (%s interleaved runs each, minimum kept)\n' \
    "$BENCH_NAME" "$BENCH_REPS"
printf '%-28s %10s %10s %8s %s\n' 'test' 'wc' 'fastwc' 'ratio' 'status'

printf '%s\n' '--- stdin lines ---'
if ! run_stdin_cases lines -l 10000 100000 1000000 10000000; then
    exit 1
fi

printf '%s\n' '--- stdin words ---'
if ! run_stdin_cases words -w 1000 100000 1000000; then
    exit 1
fi

printf '%s\n' '--- stdin lines+words+bytes ---'
if ! run_stdin_cases lines -lwc 1000000; then
    exit 1
fi

printf '\nall %s stdin benchmarks passed — fastwc was never slower than %s wc\n' \
    "$BENCH_NAME" "$BENCH_NAME"