How CUPP's Hyperspeed Print Mode Works in `print_to_file`

CUPP's hyperspeed print mode rapidly flashes each generated password on screen using a 0.1-second delay paired with terminal clears, creating a visual "scrolling" effect after saving the wordlist to disk.

CUPP (Common User Passwords Profiler) is a wordlist generation tool that includes a distinctive terminal visualization feature called hyperspeed print mode. This functionality, implemented in the print_to_file function within cupp.py, provides a dramatic preview of generated passwords by rapidly displaying entries with ANSI color codes while clearing the terminal between each line.

How print_to_file Handles File Operations

The print_to_file function in cupp.py (starting at line 19) performs three preparatory steps before offering the hyperspeed visualization:

1. Write the sorted list – The function opens the target file, sorts the password list, writes each entry separated by the platform line separator, and closes the file handle.
2. Count the entries – It reopens the file in read mode and iterates line-by-line to calculate the total word count.
3. Display the summary – A colored message prints the filename and word count using console formatting.

These steps ensure the wordlist is safely persisted to disk before any optional display logic executes.

Triggering the Hyperspeed Print Mode

After displaying the summary, the function prompts the user at line 37:

inspect = input("> Hyperspeed Print? (Y/n) : ")

If the user responds with "y", the function proceeds to the hyperspeed animation block. If declined, the function returns immediately without additional output.

The Animation Loop: Colors, Delays, and Screen Clears

The actual hyperspeed implementation spans lines 40-46 in cupp.py and executes a tightly controlled display loop:

File Handling and Memory Loading

The function opens the file in read-write mode ("r+") and loads all lines into memory:

with open(filename, "r+") as f:
    lines = f.readlines()

Visual Rendering Sequence

For each password in the list, the code performs three synchronized operations:

• ANSI Color Coding – The filename label renders in bright green (\033[1;32m) and the password itself in bright yellow (\033[1;33m).
• Throttled Output – A time.sleep(0.1) call (line 44) pauses execution for 0.1 seconds between iterations.
• Terminal Clearing – The os.system("clear") command (line 45) wipes the screen after each line, causing the next password to appear in the same terminal position.

This sequence creates the illusion of a single line rapidly changing values rather than a scrolling list. The loop includes exception handling to catch and report any file access errors that might interrupt the display.

Complete Code Example

To observe the hyperspeed effect in action, generate a small wordlist and invoke the function:

from cupp import print_to_file

# Sample candidate passwords

candidates = ["password123", "admin2022", "letmein!"]

# Function will prompt: "> Hyperspeed Print? (Y/n) :"

# Answer "y" to trigger the rapid display

print_to_file("demo.txt", candidates)

When executed, the script first saves the file and reports:

[+] Saving dictionary to demo.txt, counting 3 words.
> Hyperspeed Print? (Y/n) : y

The terminal then flashes each password individually—green filename label followed by yellow text—clearing the screen every 0.1 seconds to maintain the hyperspeed illusion.

Summary

• print_to_file in cupp.py handles both file persistence and optional terminal visualization.
• Hyperspeed mode activates via user prompt at line 37 and requires a "y" response.
• Animation mechanics rely on ANSI color codes (\033[1;32m and \033[1;33m), a 0.1-second sleep delay, and os.system("clear") to create the rapid-screen-clear effect.
• File operations use read-write mode ("r+") to load the entire wordlist into memory before displaying.

Frequently Asked Questions

What is the purpose of hyperspeed print mode in CUPP?

Hyperspeed print mode serves as a visual verification tool that rapidly previews generated passwords without dumping the entire list to the terminal. It allows users to spot-check dictionary entries immediately after generation while maintaining a clean, uncluttered console appearance through screen clearing.

How does the terminal clear effect work?

The effect utilizes os.system("clear") (line 45) to invoke the system clear command after printing each password. Combined with the 0.1-second delay from time.sleep(0.1), this replaces the previous line rather than appending to the scrollback buffer, creating a high-speed "flashing" appearance.

What file mode does CUPP use when reading for hyperspeed display?

The function opens the wordlist in read-write mode ("r+") at line 40. This mode allows the file to be read into memory while maintaining the file handle, though the hyperspeed logic only performs read operations during the animation phase.

Can I adjust the speed of the hyperspeed print animation?

According to the source code in cupp.py at line 44, the delay is hardcoded to 0.1 seconds (time.sleep(0.1)). To modify the animation speed, you would need to edit the sleep duration parameter in the source file and reinstall the modified script.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}