TODO: Update with pread/preadv/readv

TODO

@@ -24,5 +24,6 @@
  * Check/benchmark buffered vs unbuffered IO and possibly use mmap.
    There are lots of code in plugin issuing one read(2) syscall for
    small things like 4 bytes. Setting a proper buffer size (e.g. setvbuf)
-   and reading all at onece would be better performance-wise. Another option
-   is to write the common code for handling sigbus and use mmap instead.
+   and reading all at once would be better performance-wise. Another option
+   is to write the common code for handling sigbus and use mmap instead.
+   Check also whether pread/preadv/readv would be an option for some plugins.