To avoid a function call `BufferList.prototype.concat()` is not called
when there is only a buffer in the list. That buffer is instead
accessed directly.

The `n` argument of `BufferList.prototype.concat()` is not the number
of `Buffer` instances in the list, but their total length when
concatenated.

To avoid a function call `BufferList.prototype.concat()` is not called
when there is only a buffer in the list. That buffer is instead
accessed directly.

PR-URL: #18239
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

The `n` argument of `BufferList.prototype.concat()` is not the number
of `Buffer` instances in the list, but their total length when
concatenated.

PR-URL: #18239
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

To avoid a function call `BufferList.prototype.concat()` is not called
when there is only a buffer in the list. That buffer is instead
accessed directly.

PR-URL: #18239
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

The `n` argument of `BufferList.prototype.concat()` is not the number
of `Buffer` instances in the list, but their total length when
concatenated.

PR-URL: #18239
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>