prompt: Can you write me a bash script that runs a program 50 times and calculates the average and standard deviation of the time it takes to run. You have to use the Unix `time` command to get the time to run. The program should be passed as an argument. Send all program outputs to null.
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: Can you write me a bash script that runs a program 50 times and calculates the average and standard deviation of the time it takes to run. You have to use the Unix `time` command to get the time to run. The program should be passed as an argument. Send all program outputs to null.
chosen.role: assistant
chosen.content: Here is a Bash script that calculates the average execution time and standard deviation of a program:
  ```
  #!/bin/bash
  
  program="$1"
  runs=50
  times=()
  
  for ((i=1; i<=$runs; i++)); do
    exec_time=$(time -f "%e" -q "$program" 2>&1 /dev/null)
    times+=("$output")
  done
  
  total=0
  for time in "${times[@]}"; do
    total=$(echo "$total + $time" | bc)
  done
  average=$(echo "scale=6; $total / $runs" | bc)
  
  sum_sq_diff=0
  for time in "${times[@]}"; do
    diff=$(echo "$time - $average" | bc)
    sq_diff=$(echo "$diff * $diff" | bc)
    sum_sq_diff=$(echo "$sum_sq_diff + $sq_diff" | bc)
  done
  variance=$(echo "scale=6; $sum_sq_diff / $runs" | bc)
  std_deviation=$(echo "scale=6; sqrt($variance)" | bc)
  
  echo "Average execution time: $average seconds"
  echo "Standard deviation: $std_deviation seconds"
  ```
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: Can you write me a bash script that runs a program 50 times and calculates the average and standard deviation of the time it takes to run. You have to use the Unix `time` command to get the time to run. The program should be passed as an argument. Send all program outputs to null.
rejected.role: assistant