private function drawIterations(Variant $variant)
{
$subject = $variant->getSubject();
$this->output->write("[2K");
// clear the whole line
$this->output->write(PHP_EOL);
$this->output->write("[2K");
// clear the whole line
$this->output->write("[1A");
$sigma = 2;
$bins = 16;
if ($variant->isComputed()) {
$times = $variant->getMetricValues(ComputedResult::class, 'z_value');
$stats = $variant->getStats();
$freqs = Statistics::histogram($times, $bins, -$sigma, $sigma);
} else {
$stats = new Distribution([0]);
$freqs = array_fill(0, $bins + 1, null);
}
$this->output->write(sprintf('#%-2d (σ = %s ) -%sσ [', $subject->getIndex(), $this->timeUnit->format($stats->getStdev()), $sigma));
$this->drawBlocks($freqs, $stats);
$this->output->write(sprintf('] +%sσ <comment>%s</comment>', $sigma, $variant->isComputed() ? $this->formatIterationsShortSummary($variant) : ''));
$this->output->write(PHP_EOL);
}