rack/middleware: fix performance stat sending #901
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Using thread locals was not a reliable approach. While local testing was showing that subscribers share information, in production it didn't really work. It could be the order of subscribers, or something else (hard to tell). This change removes the need for thread locals and uses a shared object.
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Using thread locals was not a reliable approach. While local testing was showing
that subscribers share information, in production it didn't really work. It
could be the order of subscribers, or something else (hard to tell).
This change removes the need for thread locals and uses a shared object.