`read' is now >200x slower than under 9.2 and 10.1.10.

[Arthur A. Gleckler]

I haven't tracked down the cause, but in a trivial test case, read is more than 200x slower under 10.1.90 than under 9.2 and 10.1.10:

Executing this form:

(show-time (lambda () (do ((i 0 (1+ i))) ((= i 1000)) (with-input-from-string "foo" read))))

here is the time under 9.2:

;process time: 30 (30 RUN + 0 GC); real time: 35

and under 10.1.10:

;process time: 40 (40 RUN + 0 GC); real time: 47

and under 10.1.90 at HEAD:

;process time: 8150 (8150 RUN + 0 GC); real time: 8149

Does anyone have a clue what might have caused this decline?