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The engine would need massive adaptation before userland could safely tal= k about =E2=80=9Cparallelism.=E2=80=9D > I agree. However, this question was raised. Perhaps there=E2=80=99s a large= r team of developers working on a new virtual machine for PHP? I don=E2=80=99= t know anything about that. But if that=E2=80=99s indeed happening, then the topic becomes relevant. As for me personally, I don=E2=80=99t see any practical benefit in introduc= ing multitasking to PHP. It would require significant development effort while offering very little economic value in typical PHP use cases. Still, it=E2=80=99s possible that someone plans to build a PHP-Native versi= on for a wider range of operating systems =E2=80=94 and in that case, such a feature might indeed be needed. --- Ed