Opened 15 years ago

Closed 15 years ago

#21 closed enhancement (fixed)

read-string, order of magnitude speedup

Reported by: Jim Ursetto Owned by: felix winkelmann
Priority: major Milestone:
Component: core libraries Version: 4.0.1
Keywords: Cc: felix winkelmann
Estimated difficulty:


There was some old code that Kon added to speed up read-string on stream ports, but it was disabled (it did not work). The attached patch fixes and enables this code and also applies the speedup to unbounded reads. The result is almost exactly a 10x boost for read-string on stream ports.

Detailed benchmarks at

The patch also enables port-position updating for read-string. It only updates the column number, but I think this is sufficient for what are typically binary reads; if you want lines, use read-lines.

Attachments (1)

read-string2.diff.txt (3.7 KB) - added by Jim Ursetto 15 years ago.
read-string patch

Download all attachments as: .zip

Change History (3)

Changed 15 years ago by Jim Ursetto

Attachment: read-string2.diff.txt added

read-string patch

comment:1 Changed 15 years ago by felix winkelmann

Patch is applied, see r14507.

comment:2 Changed 15 years ago by felix winkelmann

Resolution: fixed
Status: newclosed
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