javascript - Render selected object only while moving, scaling and rotating -

i working on "photo collage maker" project needs larger canvas area , hundreds of objects(text, images, shapes, clip-arts etc.). problem while moving, scaling , rotating objects, fabric.js render objects makes slow. want render selected objects on top of fabric canvas. have tested renderonaddition, rendertop not want.

i want following:

canvas.on('object:moving', function(e) {     var activeobject = e.target;     //canvas.renderall();     canvas.renderobjects(activeobject); }); 

now instead of canvas.renderall(), need method canvas.renderobjects(activeobject). how can achieve functionality in fabric.js?

here project : edit photos free