Need help cocos2d-x Javascript performance problem

Hello.
Happy new year.
I have developed a game with cocos2d-html5 + WebGL.
But it’s performance is really not good.
I am using cocos2d-html5 3.14.
We are targeting PC web browser.
When I load images (about 250MB), and run game with Chrome browser.
But this game is using over 1.1 ~ 1.5 GB memory and 30% of CPU.
Is it normal or my mistaken in code?

I tried with cocos2d-html5 3.17

Please give me your precious advices.
Thank you
Best Regards

You should consider moving your project to Cocos Creator.

Perhaps @pandamicro might have thoughts on this.

Thank you @slackmoehrle

Hi @pandamicro
Could you please check my issue and let me know solution?
Thank you