javascript - Image slider performance -

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i testing image sliders written javascript , thought use them instead of coding scratch.

if comes big amount of images (400) horrible slow. did testing firefox developer tools , network monitor shows e.g. 5 images loading within 10-15 ms , others 300 - 600ms. totally random. images same size. overall taken on minute load 80mb. tested in local environment.

any ideas without seeing code?


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