如何存储在Javascript中的字节数组 [英] How to store a byte array in Javascript

问题描述

我要被存储在Javascript大阵字节值（最有可能超过一百万）。如果使用正常的数字的普通阵列，这将需要8 MB的，因为数字存储为IEEE加倍，但如果我可以将其存储为字节，这将是仅1 MB。

I'm going to be storing a large array of byte values (most likely over a million) in Javascript. If I use a normal array with normal numbers, that will take 8 MB, because numbers are stored as IEEE doubles, but if I can store it as bytes, it will be only 1 MB.

我想避免浪费那么多空间，原因显而易见。是否有存储字节字节而不是双打的方法吗？浏览器的兼容性不是我的问题，只要它工作在Chrome中。这是HTML5，如果有差别。

I'd like to avoid wasting that much space for obvious reasons. Is there a way to store bytes as bytes instead of doubles? Browser compatibility isn't an issue for me, as long as it works in Chrome. This is in HTML5, if that makes a difference.

推荐答案

使用类型数组的，您可存储的<一个数组href=\"https://developer.mozilla.org/en-US/docs/JavaScript_typed_arrays/ArrayBufferView#Typed_array_subclasses\">these类型的：

By using typed arrays, you can store arrays of these types:

• INT8


• UINT8


• 的Int16


• 标记Uint16


• 的Int32


• UINT32


• 浮点32


• Float64

例如：

​var array = new Uint8Array(100);
array[42] = 10;
alert(array[42]);​

看到它在行动这里。

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