`Buffer.write(Array<string|Buffer>, offset: number, encoding: string)`

[ronag]

Implement as smarter Buffer.write to avoid a lot of overhead. Consider the following example:

 poolOffset += poolBuffer.asciiWrite(`{"seq":`, poolOffset)
 poolOffset += poolBuffer.asciiWrite(seq, poolOffset)
 poolOffset += poolBuffer.asciiWrite(`,"id":"`, poolOffset)
 poolOffset += key.copy(poolBuffer, poolOffset)
 poolOffset += poolBuffer.asciiWrite(`","changes":[{"rev":"`, poolOffset)
 poolOffset += version.copy(poolBuffer, poolOffset)
 poolOffset += poolBuffer.asciiWrite(`"}]`, poolOffset)

Could be reduced to:

poolOffset += poolBuffer.write([
 `{"seq":`,
 seq,
 `,"id":"`,
 key,
 `","changes":[{"rev":"`,
 version,
 `"}]`
], poolOffset, 'ascii')

and avoid a lot of js -> cpp calls

[lemire]

It might be useful to elaborate. Why does this require new functionality in Buffer? Can't this be improved already?

(I am not being argumentative, this is a genuine question.)

[ronag]

How would you improve it? I think part of the problem is the number of times a js/c++ boundary needs to be crossed.

[ronag]

Maybe use fastcall for asciiWrite?