Creating many labels causes cpu spike

cocos2d-x C++
#1

I’m creating many labels just like this code taken from the test project:

for( int i=0 ; i < 100;i ++ ) 
{
     char str[6] = {0};
     sprintf(str, "-%d-", i);
     CCLabelBMFont* label = CCLabelBMFont::create(str, "fonts/bitmapFontTest.fnt");
     addChild(label);
     CCSize s = CCDirector::sharedDirector()->getWinSize();
     CCPoint p = ccp( CCRANDOM_0_1() * s.width, CCRANDOM_0_1() * s.height);
     label->setPosition( p );
     label->setAnchorPoint(ccp(0.5f, 0.5f));
}

The thing is that when this code executes it creates an spike in the processor that causes a sound glitch (i have custom audio generation). I solved this situation by drawing the labels spaced through the frames; i create no more than 10 labels by frame. This creates a ‘populating’ effect that i don’t desire. Is there a better way to prevent the cpu spike?