Что может быть причиной задержки, когда я запускаю мой живой график внутри pyqt5

Question

Я не могу на всю жизнь придумать лучший способ построения графика в реальном времени с помощью matplotlib внутри pyqt5.

Как сейчас, он работает, но при переопределении matplotlib наблюдается заметное заикание / отставание aws (если вы перетащите окно вокруг, вы обязательно увидите его).

Каков стандартный способ сделать это, и как далеко я?

from PyQt5.QtWidgets import*
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg,NavigationToolbar2QT
from matplotlib.figure import Figure
import time
import random
from PyQt5 import QtCore
from PyQt5 import QtWidgets
from PyQt5.QtCore import pyqtSignal
import finalmtplwindow
import sys

class Mainwindow(QtWidgets.QMainWindow, finalmtplwindow.Ui_MainWindow):
    def __init__(self,parent=None):
        super(Mainwindow, self).__init__(parent)
        self.setupUi(self)

        self.showvalues = Threading2()
        self.showvalues.my_signal2.connect(self.write)
        self.showvalues.start()

    def write(self,val):
        self.progressBar.setValue(int(val[0]))
        self.radioButton.setChecked(bool(val[1]))

class Threading2(QtCore.QThread):
    my_signal2=pyqtSignal(list)
    def __init__(self,myvar=0,parent=None):
        super(Threading2, self).__init__(parent)
        self.myvar=myvar

    def run(self):
        while 1:
            self.my_signal2.emit([random.randint(0,100),random.choice([1,0])])
            time.sleep(0.1)

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(792, 562)
        MainWindow.setStyleSheet("background-color: rgb(98, 98, 98);")
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.progressBar = QtWidgets.QProgressBar(self.centralwidget)
        self.progressBar.setGeometry(QtCore.QRect(40, 40, 118, 23))
        self.progressBar.setProperty("value", 24)
        self.progressBar.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)
        self.progressBar.setTextVisible(True)
        self.progressBar.setObjectName("progressBar")



        self.radioButton = QtWidgets.QCheckBox(self.centralwidget)
        self.radioButton.setGeometry(QtCore.QRect(620, 50, 81, 16))
        self.radioButton.setIconSize(QtCore.QSize(20, 20))
        self.radioButton.setCheckable(True)
        self.radioButton.setObjectName("radioButton")


        self.b = QtWidgets.QCheckBox(self.centralwidget)
        self.b.setGeometry(QtCore.QRect(620, 70, 81, 16))
        self.b.setIconSize(QtCore.QSize(20, 20))
        self.b.setCheckable(True)
        self.b.setObjectName("radioButton")


        self.MplWidget = MplWidget(self.centralwidget)
        self.MplWidget.setGeometry(QtCore.QRect(20, 140, 751, 391))
        self.MplWidget.setObjectName("MplWidget")

        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.textbox = QtWidgets.QLineEdit(self.centralwidget)
        self.textbox.setGeometry(QtCore.QRect(300, 40, 40, 40))
        self.textbox.setText('0')
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)


        self.radioButton.toggled.connect(self.update2)
        self.b.toggled.connect(self.reset)

        self.data = [[0], [0]]


    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.radioButton.setText(_translate("MainWindow", "Generate"))
        self.b.setText(_translate("MainWindow", "Reset"))

    def reset(self):
        self.data=[[0],[0]]

        self.MplWidget.canvas.axes.clear()
        self.MplWidget.canvas.axes.patch.set_alpha(0.5)
        self.MplWidget.canvas.draw()

    def update2(self):

        self.data[0].append(random.choice([x for x in range(10)]))
        self.data[1].append(self.data[1][-1]+1)

        if not self.textbox.text():
            size=0
        else:
            size=int(self.textbox.text())*-1


        self.MplWidget.canvas.axes.clear()
        self.MplWidget.canvas.axes.plot(self.data[1][size:], self.data[0][size:])

        self.MplWidget.canvas.axes.legend('sig', loc='best')
        self.MplWidget.canvas.axes.set_title('random signal generator')
        self.MplWidget.canvas.axes.patch.set_alpha(0.5)
        self.MplWidget.canvas.draw()
        self.MplWidget.canvas.flush_events()

class MplWidget(QWidget):

    def __init__(self, parent=None):
        QWidget.__init__(self, parent)

        self.figure = Figure()
        self.canvas = FigureCanvasQTAgg(self.figure)

        self.figure.set_facecolor("none")  # making it transparent
        self.setStyleSheet("background-color:transparent;")
        self.figure.tight_layout()

        self.toolbar = NavigationToolbar2QT(self.canvas, self)

        vertical_layout = QVBoxLayout()
        vertical_layout.addWidget(self.canvas)
        vertical_layout.addWidget(self.toolbar)

        self.canvas.axes = self.canvas.figure.add_subplot(111)
        self.canvas.axes.patch.set_alpha(0.5)
        self.canvas.axes.set_facecolor('none')

        self.setLayout(vertical_layout)

if __name__ == "__main__":
    a = QtWidgets.QApplication(sys.argv)
    app=Mainwindow()
    app.show()
    a.exec_()