title: Perf
text: # Perf
  
  Perf or PERF may refer to:
  
  * Perf (Lahn), a river in Germany
  * perf (Linux), a performance analyzing tool in Linux
  * Perf de Castro (Perfecto de Castro), Filipino musician
  * Perfect (grammar), a glossing abbreviation used in linguistics
  * Police Executive Research Forum, a US national membership organization
  * A perforation
     * Film perforations
  * "Perf", a single recorded by singer and social media personality Baby Ariel
  