Re: Confusion over how to best append

Timothy Luoma asked,

| I recently saw someone do this in a procmail recipe
| 
| :0:
| * ^SomeHeader
| | $FORMAIL -A"X-SomeHeader: value" >> MailFolder
| 
| whereas I was using this:
| 
| :0
| * ^SomeHeader
| {
|       :0fhw
|       | $FORMAIL -A "X-SomeHeader: value"
| 
|       :0:
|       MailFolder
| 
| }

Both accomplish the same result.  My personal preference is a syntax
equivalent to the second one that Timothy listed:

  :0f
  * conditions
  | filter
   :0A:
   folder

The first -- piping and appending -- requires forking a shell to handle
the redirection to a file.  The second (same for the third), according to
people who can read the source code, also requires a couple extra forks,
not just for the filtering program but [this is the part where I get lost]
for a subprocess to call it.

So it seems that the two are about the same amount of load.