bench: microsecond timing via tools/timeit, toybox oracle, words to 10M lines

benchmarks/test-all.sh

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 # test-all.sh — compile the benchmark helper tools first, then run every
 # benchmark suite (words, lines incl. monsters, stdin) against every
-# oracle found (coreutils, plus busybox for shits and giggles). Exits
-# non-zero if any of them fails, and ends with the average speedup of
-# fastwc against each oracle.
+# oracle found (coreutils, plus busybox and toybox for shits and
+# giggles). Exits non-zero if any of them fails, and ends with the
+# average speedup of fastwc against each oracle.
 #
 # usage: ./test-all.sh
 set -u
@@ -19,13 +19,19 @@ export RATIOS_FILE
 source "$SCRIPT_DIR/std.sh"
 
 # 1. build the helper tools before running any benchmark so createtxt()
-#    can use the fast C generator instead of the slow shell fallback
+#    can use the fast C generator instead of the slow shell fallback and
+#    the races are timed at µs resolution
 mkdir -p "$SCRIPT_DIR/tools"
 if ! cc -O2 -Wall -o "$SCRIPT_DIR/tools/genfile" "$SCRIPT_DIR/tools/genfile.c"; then
     printf 'test-all: error: failed to compile %s\n' "$SCRIPT_DIR/tools/genfile.c" >&2
     exit 1
 fi
 printf 'built %s\n' "$SCRIPT_DIR/tools/genfile"
+if ! cc -O2 -Wall -o "$SCRIPT_DIR/tools/timeit" "$SCRIPT_DIR/tools/timeit.c"; then
+    printf 'test-all: error: failed to compile %s\n' "$SCRIPT_DIR/tools/timeit.c" >&2
+    exit 1
+fi
+printf 'built %s\n' "$SCRIPT_DIR/tools/timeit"
 
 # 2. run each suite (all run regardless, so every result is reported)
 "$SCRIPT_DIR/files/words/bench.sh"