Severe performance degradation on Linux

Hello,

I'm opening this ML thread based on the following two forum discussions,
none of which have yielded much resolution yet:

  http://en.libreofficeforum.org/node/9850
  https://forum.openoffice.org/en/forum/viewtopic.php?f=20&t=74332

To summarize: I run an office instance locally, headless, as a listener.
Using Python and UNO I connect to that office instance, load a test
document, and iterate over its paragraphs.

On my Mac this takes 1.5s while on Linux it takes about 45s, a severe
degradation in performance.  I could reproduce this across three
different Linux machines now consistently (Gentoo, Ubuntu).

The test document and Python script are attached to both forum
discussions, and to this email.

I have not yet started a more thorough profiling of the office instance,
hoping that raising this issue to the developers might solve the
problems.

Thanks!
Jens

-- 
Jens Tröger
http://savage.light-speed.de/

Attachment: lorem.odt
Description: application/vnd.oasis.opendocument.text

import socket
import errno
import subprocess
import time
import uno
import os

if __name__ == "__main__" :

    def check_socket() :
        print("Trying to connect to office socket.")
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        result = sock.connect_ex(("localhost", 2002))
        if not result :
            print("Connected to office socket, closing test connection.")
            sock.shutdown(socket.SHUT_RDWR)
        else :
            print("Failed to connect to office socket (" + str(result) + ": " + 
errno.errorcode[result] + ").")
        sock.close()
        return result

    #
    #
    #

    myenv = os.environ.copy()                                                   
    #myenv["DISPLAY"] = ""

    # --headless --accept="socket,host=localhost,port=2002,tcpNoDelay=1;urp" --nodefault 
--nofirststartwizard --nolockcheck --nologo --norestore --invisible
    p = subprocess.Popen("soffice 
--accept=\"socket,host=localhost,port=2002;urp;StarOffice.ServiceManager\" --headless", shell=True, 
env=myenv)
    print("Spawning office instance pid=" + str(p.pid))

    while True : # BUGBUG Ought to be a countdown, not an infinite loop!
        time.sleep(2)
        if not check_socket() :
            break

    #
    #
    #

    local = uno.getComponentContext()
    resolver = local.ServiceManager.createInstanceWithContext("com.sun.star.bridge.UnoUrlResolver", 
local)
    context = 
resolver.resolve("uno:socket,host=localhost,port=2002;urp;StarOffice.ComponentContext")
    desktop = context.ServiceManager.createInstanceWithContext("com.sun.star.frame.Desktop", 
context)
    document = desktop.loadComponentFromURL("file://" + os.path.abspath("lorem.odt"), "_blank", 0, 
())

    start_time = time.time()

    parenum = document.Text.createEnumeration()
    while parenum.hasMoreElements() :
        par = parenum.nextElement()

    end_time = time.time()
    print("Elapsed time: " + str(end_time - start_time))

    p.terminate()