[New-bugs-announce] [issue26118] String performance issue using single quotes

[poostenr]

New submission from poostenr:

There appears to be a significant performance issue between the following two statements. Unable to explain performance impact.

s = "{0},".format(columnvalue)   # fast
s = "'{0}',".format(columnvalue) # ~30x slower

So far, no luck trying to find other statements to improve performance, such as:
s = "\'{0}\',".format(columnvalue)
s = "'" + "%s" %(columnvalue) + "'"+","
s = "{0}{1}{2},".format("'",columnvalue,"'")

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components: Windows
messages: 258243
nosy: paul.moore, poostenr, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: String performance issue using single quotes
type: performance
versions: Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26118>
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