title: What is 'weaving'?
body: <p>I've seen this term when read about how Spring works and I've just read the article about JPA implementation performance and it has the next statistics:</p>
  
  <pre>EclipseLink                                                           3215 ms
  (Run-time weaver - Spring ReflectiveLoadTimeWeaver weaver  )
  EclipseLink (Build-time weaving)                                      3571 ms
  EclipseLink (No weaving)                                              3996 ms</pre>
  
  <p>So, could someone explain in plain English, what is <em>weaving</em>? </p>
  
  <p>Thanks!</p>