beremiz

Build by default with optimization level -O2 for GCC

2018-05-25, Andrey Skvortsov
a66062a205ae
Build by default with optimization level -O2 for GCC

before -O0 was used by default, that caused pretty bad performance.

Amd64, i6700k, 4200MHz, GNU/Linux (non-RT kernel), gcc 7.2.0

-------------------------------------
Optimization | EN/ENO |no EN/ENO |
-------------------------------------
default | 11 | 9.5 |
-O3 | 3.9 | 5.2 |
-O2 | 4 | 4.8 |
-Os | 4.1 | 3.5 |
-Ofast | 3.9 | 5.2 |
-------------------------------------

ARM, BBB Cortex-A8, 600Mhz, GNU/Linux, gcc 4.6.3

-------------------------------------
Optimization | EN/ENO |no EN/ENO |
-------------------------------------
default | 273 | 226 |
-O3 | 141.8 | 106.2 |
-O2 | 142 | 107 |
-Os | 152.5 | 112.2 |
-Ofast | 141.7 | 106.2 |
-------------------------------------

For embedded systems with size constaints (like Cortex-Mx, AVR and so
on) I usually use -Os. It gets pretty good results. For
GNU/Linux-based systems -O2 is usually a good choice, as you see the
test results.
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<PyFile>
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<![CDATA[
from threading import Thread
def OnConnectButton(self, event):
def OnWiiConnected(mac_addr):
self.label_2.SetLabel(
"Wiimote %s connected"%mac_addr
if mac_addr else
"Wiimote connection failed !")
def WiiConnected(mac_addr):
wx.CallAfter(OnWiiConnected,mac_addr)
Thread(target = Connect_Wiimote, args = (WiiConnected,)).start()
self.label_2.SetLabel("Press wiimote 1+2")
event.Skip()
def OnDisconnectButton(self, event):
Disconnect_Wiimote()
self.label_2.SetLabel("Wiimote disconnected")
event.Skip()
]]>
</globals>
<init>
<![CDATA[
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</init>
<cleanup>
<![CDATA[
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</cleanup>
<start>
<![CDATA[
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</start>
<stop>
<![CDATA[
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</stop>
</PyFile>