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Performance drop in PersistentHashMap.valAt(...) in v.1.4 -- Util.hasheq(...) ?

Description

It seems there is a 30-40% performance degradation of PersistentHashMap.valAt(...) in Clojure 1.4.
Possibly due to references to new CPU-hungry implementation of Util.hasheq(...).

I have created a demo project with more details and some profiling information here:
https://github.com/oshyshko/clj-perf

Environment

Java(TM) SE Runtime Environment (build 1.7.0_04-b21)
Java HotSpot(TM) 64-Bit Server VM (build 23.0-b21, mixed mode)

Status

Assignee

Timothy Baldridge

Reporter

import

Labels

Approval

Ok

Patch

Code

Fix versions

Affects versions

Release 1.4

Priority

Major