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Fix measure approximation and allow tuning to just over half file

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batch.
This commit is contained in:
Andrey Kotlarski 2014-09-05 19:11:48 +03:00
parent 48a014f3bc
commit f3212ec9a6
1 changed files with 9 additions and 11 deletions
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20
vlf-tune.el
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@ -180,17 +180,14 @@ SIZE is number of bytes that are saved."
(max (length vec)))
(while (and (zerop val) (or (<= 0 left-idx)
(< right-idx max)))
(when (<= 0 left-idx)
(setq val (car (aref vec left-idx)))
(if (and (not (zerop val)) (/= val -1))
(setq val (/ (* val (1+ index))
(1+ left-idx)))))
(if (<= 0 left-idx)
(let ((left (car (aref vec left-idx))))
(if (and (not (zerop left)) (/= left -1))
(setq val left))))
(if (< right-idx max)
(let ((right (car (aref vec left-idx))))
(let ((right (car (aref vec right-idx))))
(if (and (not (zerop right)) (/= right -1))
(setq right (/ (* right (1+ index))
(1+ right-idx))
val (if (zerop val)
(setq val (if (zerop val)
right
(/ (+ val right) 2))))))
(setq left-idx (1- left-idx)
@ -244,7 +241,7 @@ SIZE is number of bytes that are saved."
"Adjust `vlf-batch-size' to best nearby value over TYPES.
INDEX if given, specifies search independent of current batch size."
(if (eq vlf-tune-enabled t)
(let* ((half-max (/ vlf-file-size 2))
(let* ((half-max (/ (1+ vlf-file-size) 2))
(idx (or index (vlf-tune-closest-index vlf-batch-size)))
(curr (if (< half-max (* idx vlf-tune-step)) t
(vlf-tune-score types idx))))
@ -321,7 +318,8 @@ non list values in which case coeficient is assumed 1.
Types can be :insert, :raw, :encode, :write, :hexl or :dehexlify.
If LINEAR is non nil, use brute-force."
(if (eq vlf-tune-enabled t)
(let ((max-idx (1- (/ (min vlf-tune-max (/ vlf-file-size 2))
(let ((max-idx (1- (/ (min vlf-tune-max
(/ (1+ vlf-file-size) 2))
vlf-tune-step))))
(cond (linear (vlf-tune-linear types max-idx))
((file-remote-p buffer-file-name)