From 04439892ac8d81a3af59602df2031dd8f0d2b622 Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Fri, 31 Jul 2026 12:06:59 +0800
Subject: Capture time and max RSS in test script.

---
 test_prompts.sh | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/test_prompts.sh b/test_prompts.sh
index 3178efb..04020c3 100755
--- a/test_prompts.sh
+++ b/test_prompts.sh
@@ -17,8 +17,8 @@ if [ ! -f "$PROMPT_FILE" ]; then
     exit 1
 fi
 
-# Count total valid prompts (ignoring empty lines and comments)
-total_prompts=$(grep -cvE '^[[:space:]]*($|#)' "$PROMPT_FILE")
+# Count valid prompts using POSIX awk to avoid ksh $(...) parenthetical syntax errors
+total_prompts=$(awk '/^[[:space:]]*($|#)/ {next} {count++} END {print count+0}' "$PROMPT_FILE")
 
 if [ "$total_prompts" -eq 0 ]; then
     echo "No valid prompts found in '$PROMPT_FILE'."
@@ -43,6 +43,10 @@ echo "---------------------------------------------------"
 current=0
 first=1
 
+# Temporary file to capture time / rusage output
+TIME_LOG=$(mktemp /tmp/lex_time.XXXXXX)
+trap 'rm -f "$TIME_LOG"' EXIT
+
 # Process each prompt line by line
 while IFS= read -r prompt || [ -n "$prompt" ]; do
     # Skip empty lines or comment lines starting with #
@@ -52,9 +56,6 @@ while IFS= read -r prompt || [ -n "$prompt" ]; do
 
     current=$((current + 1))
 
-    # Print real-time progress to terminal
-    printf "[%d/%d] Running: %s\n" "$current" "$total_prompts" "$prompt"
-
     # Add delimiter before every prompt except the first in the results file
     if [ "$first" -eq 1 ]; then
         first=0
@@ -65,11 +66,22 @@ while IFS= read -r prompt || [ -n "$prompt" ]; do
     # Log prompt header to the result file
     printf "PROMPT: %s\n\n" "$prompt" >> "$RESULT_FILE"
 
-    # Invoke the executable and append output to result file
-    "$EXECUTABLE" "$prompt" >> "$RESULT_FILE" 2>&1
+    # On OpenBSD, /usr/bin/time -lp outputs POSIX timings and rusage stats to stderr
+    /usr/bin/time -lp "$EXECUTABLE" "$prompt" >> "$RESULT_FILE" 2> "$TIME_LOG"
+
+    # Extract execution time and peak memory (maximum resident set size) from OpenBSD time output
+    real_time=$(awk '/^real/ {print $2}' "$TIME_LOG")
+	max_rss_mb=$(awk '/maximum resident set size/ {printf "%.2f", $1/1024}' "$TIME_LOG")
+
+    # Format metrics summary line
+    metrics_summary="ELAPSED: ${real_time}s | MAX RSS: ${max_rss_mb} MB"
+
+    # Append metrics to result file
+    printf "METRICS: %s\n\n" "$metrics_summary" >> "$RESULT_FILE"
+
+    # Print real-time progress to terminal
+    printf "[%d/%d] Done: %s (%s)\n" "$current" "$total_prompts" "$prompt" "$metrics_summary"
 
-    # Ensure a trailing newline after output
-    printf "\n" >> "$RESULT_FILE"
 done < "$PROMPT_FILE"
 
 echo "---------------------------------------------------"
-- 
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