diff --git a/plugins/tools/selectiontools/KisToolSelectMagnetic.cc b/plugins/tools/selectiontools/KisToolSelectMagnetic.cc
index 292a448ad4..4de1557c09 100644
--- a/plugins/tools/selectiontools/KisToolSelectMagnetic.cc
+++ b/plugins/tools/selectiontools/KisToolSelectMagnetic.cc
@@ -1,480 +1,494 @@
 /*
  *  Copyright (c) 2019 Kuntal Majumder <hellozee@disroot.org>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 #include "KisToolSelectMagnetic.h"
 
 #include <QApplication>
 #include <QPainter>
 #include <QWidget>
 #include <QPainterPath>
 #include <QLayout>
 #include <QVBoxLayout>
 
 #include <kis_debug.h>
 #include <klocalizedstring.h>
 
 #include <KoPointerEvent.h>
 #include <KoShapeController.h>
 #include <KoPathShape.h>
 #include <KoColorSpace.h>
 #include <KoCompositeOp.h>
 #include <KoViewConverter.h>
 
 #include <kis_layer.h>
 #include <kis_selection_options.h>
 #include <kis_cursor.h>
 #include <kis_image.h>
 
 #include "kis_painter.h"
 #include <brushengine/kis_paintop_registry.h>
 #include "canvas/kis_canvas2.h"
 #include "kis_pixel_selection.h"
 #include "kis_selection_tool_helper.h"
 
 #include "kis_algebra_2d.h"
 
 #include "KisHandlePainterHelper.h"
 
 #include <kis_slider_spin_box.h>
 
 #define FEEDBACK_LINE_WIDTH 2
 
 #define distBetween(x, y) kisDistance(pixelToView(m_points[x]), pixelToView(m_points[y]))
 
 KisToolSelectMagnetic::KisToolSelectMagnetic(KoCanvasBase *canvas)
     : KisToolSelect(canvas,
                     KisCursor::load("tool_magnetic_selection_cursor.png", 5, 5),
                     i18n("Magnetic Selection")),
-    m_continuedMode(false), m_complete(true), m_threshold(70), m_checkPoint(-1), m_frequency(30), m_radius(3.0)
+    m_continuedMode(false), m_complete(true), m_threshold(70), m_checkPoint(-1), m_frequency(30), m_radius(3.0),
+    m_radiusSliderCompressor(1000, KisSignalCompressor::FIRST_ACTIVE), m_mouseHoverCompressor(100, KisSignalCompressor::FIRST_ACTIVE)
 { }
 
 void KisToolSelectMagnetic::keyPressEvent(QKeyEvent *event)
 {
     if (event->key() == Qt::Key_Control) {
         m_continuedMode = true;
     }
 
     KisToolSelect::keyPressEvent(event);
 }
 
 void KisToolSelectMagnetic::keyReleaseEvent(QKeyEvent *event)
 {
     if (event->key() == Qt::Key_Control ||
         !(event->modifiers() & Qt::ControlModifier))
     {
         m_continuedMode = false;
         if (mode() != PAINT_MODE && !m_points.isEmpty()) {
             finishSelectionAction();
         }
     }
 
     KisToolSelect::keyReleaseEvent(event);
 }
 
 /*
  * Calculates the checkpoints responsible to determining the last point from where
  * the edge is calculated.
  * Takes 3 point, min, median and max, searches for an edge point from median to max, if fails,
  * searches for the same from median to min, if fails, median becomes that edge point.
  */
 void KisToolSelectMagnetic::calculateCheckPoints()
 {
     qreal totalDistance = 0.0;
     int finalPoint = m_checkPoint + 2;
     int midPoint = m_checkPoint + 1;
     int minPoint = m_checkPoint;
-    qreal maxFactor = 1.7;
+    qreal maxFactor = 2;
 
     for(; finalPoint<m_points.count(); finalPoint++){
         totalDistance += kisDistance(m_points[finalPoint], m_points[finalPoint - 1]);
 
         if(totalDistance <= m_frequency/3){
             minPoint = finalPoint;
         }
 
         if(totalDistance <= m_frequency){
             midPoint = finalPoint;
         }
 
         if(totalDistance > maxFactor*m_frequency){
             break;
         }
     }
 
     if(totalDistance > maxFactor*m_frequency){
         bool foundSomething = false;
 
         for(int i = midPoint; i < finalPoint; i++){
             if(m_worker.intensity(m_points.at(i).toPoint()) >= m_threshold){
                 m_checkPoint = i;
                 m_lastAnchor = m_points.at(i).toPoint();
                 m_anchorPoints.push_back(i);
                 foundSomething = true;
                 break;
             }
         }
 
         if(!foundSomething){
             for(int i = midPoint - 1; i>= minPoint; i--){
                 if(m_worker.intensity(m_points.at(i).toPoint()) >= m_threshold){
                     m_checkPoint = i;
                     m_lastAnchor = m_points.at(i).toPoint();
                     m_anchorPoints.push_back(i);
                     foundSomething = true;
                     break;
                 }
             }
         }
 
         if(!foundSomething && m_checkPoint >= 0){
             m_checkPoint = midPoint;
             m_lastAnchor = m_points.at(m_checkPoint).toPoint();
             m_anchorPoints.push_back(m_checkPoint);
             foundSomething = true;
         }
     }
 
     totalDistance = 0.0;
 
     for(; finalPoint<m_points.count(); finalPoint++){
         totalDistance += kisDistance(m_points[finalPoint], m_points[m_checkPoint]);
 
         if(totalDistance > maxFactor*m_frequency){
             calculateCheckPoints();
             totalDistance = 0.0;
         }
     }
-
 }
 
-// the cursor is still tracked even when no mousebutton is pressed
-void KisToolSelectMagnetic::mouseMoveEvent(KoPointerEvent *event)
+void KisToolSelectMagnetic::slotCalculateEdge()
 {
-    KisToolSelect::mouseMoveEvent(event);
-    if (m_complete)
-        return;
-
-    m_lastCursorPos = convertToPixelCoord(event);
     QPoint current = m_lastCursorPos.toPoint();
 
     vQPointF pointSet = m_worker.computeEdge(m_frequency, m_lastAnchor, current);
     m_points.resize(m_checkPoint);
     m_points.append(pointSet);
 
     calculateCheckPoints();
 
     m_paintPath = QPainterPath();
     m_paintPath.moveTo(pixelToView(m_points[0]));
 
     for (int i = 1; i < m_points.count(); i++) {
         m_paintPath.lineTo(pixelToView(m_points[i]));
     }
 
     updateFeedback();
 
     if (m_continuedMode && mode() != PAINT_MODE) {
         updateContinuedMode();
     }
+}
+
+// the cursor is still tracked even when no mousebutton is pressed
+void KisToolSelectMagnetic::mouseMoveEvent(KoPointerEvent *event)
+{
+    KisToolSelect::mouseMoveEvent(event);
+    if (m_complete)
+        return;
+
+    m_lastCursorPos = convertToPixelCoord(event);
+
+    m_mouseHoverCompressor.start();
+
 } // KisToolSelectMagnetic::mouseMoveEvent
 
 // press primary mouse button
 void KisToolSelectMagnetic::beginPrimaryAction(KoPointerEvent *event)
 {
     setMode(KisTool::PAINT_MODE);
     QPointF temp(convertToPixelCoord(event));
     m_lastAnchor = QPoint((int) temp.x(), (int) temp.y());
     m_checkPoint = m_points.count() == 0 ? 0 : m_points.count() - 1;
 
     if (m_anchorPoints.count() == 0) {
         m_snapBound = QRect(QPoint(0, 0), QSize(10, 10));
         m_snapBound.moveCenter(m_lastAnchor);
     }
 
     if (m_anchorPoints.count() > 0 && m_snapBound.contains(m_lastAnchor)) {
         m_complete = true;
         finishSelectionAction();
         return;
     }
 
     m_anchorPoints.push_back(m_checkPoint);
     m_complete = false;
     updateCanvasPixelRect(image()->bounds());
 }
 
 // drag while primary mouse button is pressed
 void KisToolSelectMagnetic::continuePrimaryAction(KoPointerEvent *event)
 {
     KisToolSelectBase::continuePrimaryAction(event);
 }
 
 // release primary mouse button
 void KisToolSelectMagnetic::endPrimaryAction(KoPointerEvent *event)
 {
     KisToolSelectBase::endPrimaryAction(event);
 }
 
 void KisToolSelectMagnetic::finishSelectionAction()
 {
     KisCanvas2 *kisCanvas = dynamic_cast<KisCanvas2 *>(canvas());
     KIS_ASSERT_RECOVER_RETURN(kisCanvas);
     kisCanvas->updateCanvas();
     setMode(KisTool::HOVER_MODE);
 
     //just for testing out
-    //m_worker.saveTheImage(m_points);
+    m_worker.saveTheImage(m_points);
 
     QRectF boundingViewRect =
         pixelToView(KisAlgebra2D::accumulateBounds(m_points));
 
     KisSelectionToolHelper helper(kisCanvas, kundo2_i18n("Magnetic Selection"));
 
     if (m_points.count() > 2 &&
         !helper.tryDeselectCurrentSelection(boundingViewRect, selectionAction()))
     {
         QApplication::setOverrideCursor(KisCursor::waitCursor());
 
         const SelectionMode mode =
             helper.tryOverrideSelectionMode(kisCanvas->viewManager()->selection(),
                                             selectionMode(),
                                             selectionAction());
         if (mode == PIXEL_SELECTION) {
             KisPixelSelectionSP tmpSel = KisPixelSelectionSP(new KisPixelSelection());
 
             KisPainter painter(tmpSel);
             painter.setPaintColor(KoColor(Qt::black, tmpSel->colorSpace()));
             painter.setAntiAliasPolygonFill(antiAliasSelection());
             painter.setFillStyle(KisPainter::FillStyleForegroundColor);
             painter.setStrokeStyle(KisPainter::StrokeStyleNone);
 
             painter.paintPolygon(m_points);
 
             QPainterPath cache;
             cache.addPolygon(m_points);
             cache.closeSubpath();
             tmpSel->setOutlineCache(cache);
 
             helper.selectPixelSelection(tmpSel, selectionAction());
         } else {
             KoPathShape *path = new KoPathShape();
             path->setShapeId(KoPathShapeId);
 
             QTransform resolutionMatrix;
             resolutionMatrix.scale(1 / currentImage()->xRes(), 1 / currentImage()->yRes());
             path->moveTo(resolutionMatrix.map(m_points[0]));
             for (int i = 1; i < m_points.count(); i++)
                 path->lineTo(resolutionMatrix.map(m_points[i]));
             path->close();
             path->normalize();
             helper.addSelectionShape(path, selectionAction());
         }
         QApplication::restoreOverrideCursor();
     }
     m_points.clear();
     m_anchorPoints.clear();
     m_paintPath = QPainterPath();
 } // KisToolSelectMagnetic::finishSelectionAction
 
 void KisToolSelectMagnetic::paint(QPainter& gc, const KoViewConverter &converter)
 {
     Q_UNUSED(converter);
 
     if ((mode() == KisTool::PAINT_MODE || m_continuedMode) &&
         !m_points.isEmpty())
     {
         QPainterPath outline = m_paintPath;
         if (m_continuedMode && mode() != KisTool::PAINT_MODE) {
             outline.lineTo(pixelToView(m_lastCursorPos));
         }
         paintToolOutline(&gc, outline);
 
         //printing the handles
         bool firstPoint = true;
         Q_FOREACH (const int pt, m_anchorPoints) {
             if(pt < 0){
                 //no points are set
                 continue;
             }
             KisHandlePainterHelper helper(&gc, handleRadius());
             if(m_snapBound.contains(m_lastCursorPos) && firstPoint){
                 helper.setHandleStyle(KisHandleStyle::secondarySelection());
                 helper.drawHandleRect(pixelToView(m_points[pt]), 4, QPoint(0,0));
                 firstPoint = false;
                 continue;
             }
             helper.setHandleStyle(KisHandleStyle::primarySelection());
             helper.drawHandleRect(pixelToView(m_points[pt]), 4, QPoint(0,0));
         }
     }
 }
 
 void KisToolSelectMagnetic::updateFeedback()
 {
     if (m_points.count() > 1) {
         qint32 lastPointIndex = m_points.count() - 1;
 
         QRectF updateRect = QRectF(m_points[lastPointIndex - 1], m_points[lastPointIndex]).normalized();
         updateRect = kisGrowRect(updateRect, FEEDBACK_LINE_WIDTH);
 
         updateCanvasPixelRect(updateRect);
     }
 }
 
 void KisToolSelectMagnetic::updateContinuedMode()
 {
     if (!m_points.isEmpty()) {
         qint32 lastPointIndex = m_points.count() - 1;
 
         QRectF updateRect = QRectF(m_points[lastPointIndex - 1], m_lastCursorPos).normalized();
         updateRect = kisGrowRect(updateRect, FEEDBACK_LINE_WIDTH);
 
         updateCanvasPixelRect(updateRect);
     }
 }
 
 void KisToolSelectMagnetic::activate(KoToolBase::ToolActivation activation, const QSet<KoShape *> &shapes)
 {
     m_worker      = KisMagneticWorker(image()->projection(), m_radius);
     m_configGroup = KSharedConfig::openConfig()->group(toolId());
     connect(action("undo_polygon_selection"), SIGNAL(triggered()), SLOT(undoPoints()), Qt::UniqueConnection);
+    connect(&m_radiusSliderCompressor, SIGNAL(timeout()), this, SLOT(slotUpdateRadius()));
+    connect(&m_mouseHoverCompressor, SIGNAL(timeout()), this, SLOT(slotCalculateEdge()));
     KisToolSelect::activate(activation, shapes);
 }
 
 void KisToolSelectMagnetic::deactivate()
 {
     KisCanvas2 *kisCanvas = dynamic_cast<KisCanvas2 *>(canvas());
     KIS_ASSERT_RECOVER_RETURN(kisCanvas);
     kisCanvas->updateCanvas();
 
     m_continuedMode = false;
     m_complete      = true;
 
     disconnect(action("undo_polygon_selection"), 0, this, 0);
 
     KisTool::deactivate();
 }
 
 void KisToolSelectMagnetic::undoPoints()
 {
     if (m_complete) return;
 
     m_anchorPoints.pop_back();
     m_lastAnchor = m_points[m_anchorPoints.last()].toPoint();
     m_checkPoint = m_anchorPoints.last();
     updateCanvasPixelRect(image()->bounds());
 }
 
 void KisToolSelectMagnetic::requestStrokeEnd()
 {
     if (m_complete) return;
 
     m_complete = true;
     finishSelectionAction();
 }
 
 void KisToolSelectMagnetic::requestStrokeCancellation()
 {
     setMode(KisTool::HOVER_MODE);
     m_complete = true;
     m_points.clear();
     m_anchorPoints.clear();
     m_paintPath = QPainterPath();
     updateCanvasPixelRect(image()->bounds());
 }
 
 QWidget * KisToolSelectMagnetic::createOptionWidget()
 {
     KisToolSelectBase::createOptionWidget();
     KisSelectionOptions *selectionWidget = selectionOptionWidget();
     QHBoxLayout *f1 = new QHBoxLayout();
     QLabel *lblRad  = new QLabel(i18n("Radius: "), selectionWidget);
     f1->addWidget(lblRad);
 
     KisDoubleSliderSpinBox *radInput = new KisDoubleSliderSpinBox(selectionWidget);
     radInput->setObjectName("radius");
     radInput->setRange(2.5, 100.0, 2);
     radInput->setSingleStep(0.5);
     radInput->setToolTip("Radius of the filter for the detecting edges, might take some time to calculate");
     f1->addWidget(radInput);
     connect(radInput, SIGNAL(valueChanged(qreal)), this, SLOT(slotSetRadius(qreal)));
 
     QHBoxLayout *f2      = new QHBoxLayout();
     QLabel *lblThreshold = new QLabel(i18n("Threshold: "), selectionWidget);
     f2->addWidget(lblThreshold);
 
     KisSliderSpinBox *threshInput = new KisSliderSpinBox(selectionWidget);
     threshInput->setObjectName("threshold");
     threshInput->setRange(1, 255);
     threshInput->setSingleStep(10);
     threshInput->setToolTip("Threshold for determining the minimum intensity of the edges");
     f2->addWidget(threshInput);
     connect(threshInput, SIGNAL(valueChanged(int)), this, SLOT(slotSetThreshold(int)));
 
     QHBoxLayout *f3      = new QHBoxLayout();
     QLabel *lblFrquency = new QLabel(i18n("Anchor Gap: "), selectionWidget);
     f3->addWidget(lblFrquency);
 
     KisSliderSpinBox *freqInput = new KisSliderSpinBox(selectionWidget);
     freqInput->setObjectName("frequency");
     freqInput->setRange(20, 200);
     freqInput->setSingleStep(10);
     freqInput->setToolTip("Average distance between 2 anchors in screen pixels");
     freqInput->setSuffix(" px");
     f3->addWidget(freqInput);
     connect(freqInput, SIGNAL(valueChanged(int)), this, SLOT(slotSetFrequency(int)));
 
     QVBoxLayout *l = dynamic_cast<QVBoxLayout *>(selectionWidget->layout());
     Q_ASSERT(l);
     l->insertLayout(1, f1);
     l->insertLayout(2, f2);
     l->insertLayout(3, f3);
 
     radInput->setValue(m_configGroup.readEntry("radius", 3.0));
     threshInput->setValue(m_configGroup.readEntry("threshold", 100));
     freqInput->setValue(m_configGroup.readEntry("frequency", 30));
     return selectionWidget;
 } // KisToolSelectMagnetic::createOptionWidget
 
 void KisToolSelectMagnetic::slotSetRadius(qreal r)
 {
+    m_radiusSliderCompressor.start();
     m_radius = r;
-    m_worker = KisMagneticWorker(image()->projection(), m_radius);
     m_configGroup.writeEntry("radius", r);
 }
 
 void KisToolSelectMagnetic::slotSetThreshold(int t)
 {
     m_threshold = t;
     m_configGroup.writeEntry("threshold", t);
 }
 
 void KisToolSelectMagnetic::slotSetFrequency(int f)
 {
     m_frequency = f;
     m_configGroup.writeEntry("frequency", f);
 }
 
+void KisToolSelectMagnetic::slotUpdateRadius()
+{
+    m_worker = KisMagneticWorker(image()->projection(), m_radius);
+}
+
 void KisToolSelectMagnetic::resetCursorStyle()
 {
     if (selectionAction() == SELECTION_ADD) {
         useCursor(KisCursor::load("tool_magnetic_selection_cursor_add.png", 6, 6));
     } else if (selectionAction() == SELECTION_SUBTRACT) {
         useCursor(KisCursor::load("tool_magnetic_selection_cursor_sub.png", 6, 6));
     } else {
         KisToolSelect::resetCursorStyle();
     }
 }
diff --git a/plugins/tools/selectiontools/KisToolSelectMagnetic.h b/plugins/tools/selectiontools/KisToolSelectMagnetic.h
index 796a0dde1a..b337c40f34 100644
--- a/plugins/tools/selectiontools/KisToolSelectMagnetic.h
+++ b/plugins/tools/selectiontools/KisToolSelectMagnetic.h
@@ -1,116 +1,120 @@
 /*
  *  Copyright (c) 2019 Kuntal Majumder <hellozee@disroot.org>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 #ifndef KIS_TOOL_SELECT_MAGNETIC_H_
 #define KIS_TOOL_SELECT_MAGNETIC_H_
 
 #include <QPoint>
 #include "KisSelectionToolFactoryBase.h"
 #include <kis_tool_select_base.h>
 #include <kis_icon.h>
+#include <kis_signal_compressor.h>
 #include "KisMagneticWorker.h"
 
 class QPainterPath;
 
 class KisToolSelectMagnetic : public KisToolSelect
 {
     Q_OBJECT
 
 public:
     KisToolSelectMagnetic(KoCanvasBase *canvas);
     ~KisToolSelectMagnetic() override = default;
     void beginPrimaryAction(KoPointerEvent *event) override;
     void continuePrimaryAction(KoPointerEvent *event) override;
     void endPrimaryAction(KoPointerEvent *event) override;
     void paint(QPainter& gc, const KoViewConverter &converter) override;
 
     void keyPressEvent(QKeyEvent *event) override;
     void keyReleaseEvent(QKeyEvent *event) override;
 
     void mouseMoveEvent(KoPointerEvent *event) override;
 
     void resetCursorStyle() override;
     void requestStrokeEnd() override;
     void requestStrokeCancellation() override;
     QWidget * createOptionWidget() override;
 
 public Q_SLOTS:
     void deactivate() override;
     void activate(KoToolBase::ToolActivation activation, const QSet<KoShape *> &shapes) override;
     void undoPoints();
     void slotSetRadius(qreal);
     void slotSetThreshold(int);
     void slotSetFrequency(int);
+    void slotUpdateRadius();
+    void slotCalculateEdge();
 
 protected:
     using KisToolSelectBase::m_widgetHelper;
 
 private:
     void finishSelectionAction();
     void updateFeedback();
     void updateContinuedMode();
     void updateCanvas();
     void calculateCheckPoints();
 
     QPainterPath m_paintPath;
     QVector<QPointF> m_points;
     QVector<int> m_anchorPoints;
     bool m_continuedMode;
     QPointF m_lastCursorPos;
     QPoint m_lastAnchor;
     bool m_complete;
     KisMagneticWorker m_worker;
     int m_threshold, m_checkPoint, m_frequency;
     qreal m_radius;
     QRectF m_snapBound;
     KConfigGroup m_configGroup;
+    KisSignalCompressor m_radiusSliderCompressor, m_mouseHoverCompressor;
 };
 
 class KisToolSelectMagneticFactory : public KisSelectionToolFactoryBase
 {
 public:
     KisToolSelectMagneticFactory()
         : KisSelectionToolFactoryBase("KisToolSelectMagnetic")
     {
         setToolTip(i18n("Magnetic Selection Tool"));
         setSection(TOOL_TYPE_SELECTION);
         setIconName(koIconNameCStr("tool_magnetic_selection"));
         setPriority(8);
         setActivationShapeId(KRITA_TOOL_ACTIVATION_ID);
     }
 
     ~KisToolSelectMagneticFactory() override { }
 
     KoToolBase * createTool(KoCanvasBase *canvas) override
     {
         return new KisToolSelectMagnetic(canvas);
     }
 
     QList<QAction *> createActionsImpl() override
     {
         KisActionRegistry *actionRegistry = KisActionRegistry::instance();
         QList<QAction *> actions = KisSelectionToolFactoryBase::createActionsImpl();
 
         actions << actionRegistry->makeQAction("undo_polygon_selection");
 
         return actions;
     }
 };
 
 
 #endif // __selecttoolmagnetic_h__