`ox_flush'
----------

ox_flush(ID)
     :: Flushes the sending buffer.

RETURN
     1

ID
     process identifier

   * By default the batch mode is off and the sending buffer is flushed
     at every sending operation of data and command.

   * The batch mode is set by `"ox_batch"' switch of `"ctrl"'.

   * If one wants to send many pieces of small data,
     `ctrl("ox_batch",1)' may decrease the overhead of flush operations.
     Of course, one has to call `ox_flush(ID)' at the end of the
     sending operations.

   * Functions such as `ox_pop_cmo' and `ox_pop_local' enter a waiting
     mode immediately after sending a command.  These functions always
     flush the sending buffer.

     [340] ox_launch_nox();
     0
     [341] cputime(1);
     0
     7e-05sec + gc : 4.8e-05sec(0.000119sec)
     [342] for(I=0;I<10000;I++)ox_push_cmo(0,I);
     0.232sec + gc : 0.006821sec(0.6878sec)
     [343] ctrl("ox_batch",1);
     1
     4.5e-05sec(3.302e-05sec)
     [344] for(I=0;I<10000;I++)ox_push_cmo(0,I); ox_flush(0);
     0.08063sec + gc : 0.06388sec(0.4408sec)
     [345] 1
     9.6e-05sec(0.01317sec)

References
     *Note `ox_pop_cmo ox_pop_local': ox_pop_cmo ox_pop_local, *Note
     `ctrl': ctrl

