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It doesn't test the IMHO currently best. https://greg7mdp.github.io/parallel-hashmap/

And I don't see the TSX benefits, which is Intel only.

The benefits are visible if you search for the word "TSX". It says:

"Replacing the insert and update functions of our specialized growing hash table with Intel TSX variants increases the throughput of our hash table by up to 7%"

... but if you just ctrl-F for TSX, you probably won't find it, because of this unique web viewer.

Has there ever been an Intel CPU with working TSX that didn't get disabled by a microcode update?

Afaik Skylake/Kabylake.

It looks to me like Intel recommends disabling TSX on all SKUs due to Zombieload V2.

Well, yeah, TSX appears to be a side channel attack exploitable by a malicious hyperthread. But that's not particularly close to TSX itself being buggy on Haswell.

If you only run trusted code, Zombieload V2 seems irrelevant (on first glance. I didn't look deeper to see if there are ways to exploit it from a bytecode interpreter or such.)

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