如何在嵌入Qt环境的matplotlib中更快地绘制大量的信号？

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
import numpy as np

class PlotWidget(QWidget):
    def __init__(self, parent=None):
        super(PlotWidget, self).__init__(parent)
        self.figure = Figure()
        self.canvas = FigureCanvas(self.figure)
        self.ax = self.figure.add_subplot(111)
        layout = QVBoxLayout(self)
        layout.addWidget(self.canvas)

    def plot_signals(self, signals):
        self.ax.clear()
        for signal in signals:
            self.ax.plot(signal, label=f'Signal {len(signals)}')
        self.ax.legend()
        self.canvas.draw()

class MainWindow(QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.plot_widget = PlotWidget()
        self.setCentralWidget(self.plot_widget)
        self.show()

        # Generate some example signals
        signals = [np.random.rand(10000) for _ in range(10)]
        self.plot_widget.plot_signals(signals)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    mainWin = MainWindow()
    sys.exit(app.exec_())