When perlasm generates MASM code it sets the assembler target to 468.
In this mode MASM refuses to assemble a couple of instructions. Bumping
the target to 686 solves this problem.

It used to be off before. It's extremely unlikely that such an attack
would be a viable attack against node. And it makes AES much slower.

For throughput benchmarks, run with just 5s durations rather than 1s and 3s.

For startup benchmark, run with just a single 1s duration, since it's very
consistent anyway.

Remove ab, since it's no longer used.

Also, make it work properly with current node.

Better covered by the other benchmark/fs scripts.

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