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I little confused here. Do ArrayBuffer allocate a new memory region for it? If so, what would be the safe maximum Blob size to put on it?
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The maximum buffer size for input/output is 32767 bytes.
Uint8Array – treats each byte in ArrayBuffer as a separate number, with possible values from 0 to 255 (a byte is 8-bit, so it can hold only that much). Such value is called a “8-bit unsigned integer”. Uint16Array – treats every 2 bytes as an integer, with possible values from 0 to 65535.
The ArrayBuffer object is used to represent a generic, fixed-length raw binary data buffer. It is an array of bytes, often referred to in other languages as a "byte array".
The Uint8Array. from() method is used to create a new Uint8Array from an array-like or iterable object. So when you want to convert an arrayLike or iterable object then you can be used this function by passing the object as a parameter to this function along with map function and value used for map function if needed.
That only depends on your system and there doesn't seems to be a limit.
According to the specification :
If the requested number of bytes could not be allocated an exception is raised.
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what would be the safe maximum Blob size to put on it
There does not seem to be a hard limit, just whatever restrictions your platform imposes.
However, if one uses some sort of indexed access, indexes shouldn't be greater than Number.MAX_SAFE_INTEGER, because interesting bugs would happen otherwise.
Luckily, 2^53-1 bytes is around 8 petabytes so it shuoldn't be a concern unless you are doing something really weird.
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