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### comment on

 Need Help??

I don't think so, I mean in the first place I got rid of this interpolation problem by testing the log level using a call to Log4perl:

```if (\$self->{logger}->is_trace()) { # for efficiency (not to compute th
+e expression)
\$self->{logger}->trace("total NbObsThis \$i=\$nbObservedThis
+NGram->[\$i]; nbObsAll \$i=\$nbObservedAllNGrams->[\$i]; total=\$totalObse
+rvedAll; nbExpected \$i=\$nbExpectedThis[\$i]; chisq = \$chiSquare[\$i]")
}

It helped indeed, but the cost of "is_trace()" was still prohibitive. Then I added a new variable \$self->{disableLogger} set to true if the level is OFF (testing the log level only once) and replaced the condition with

```if (!\$self->{disableLogger} && \$self->{logger}->is_trace()) { # test f
+or efficiency (not to compute the expression) {
\$self->{logger}->trace("total NbObsThis \$i=\$nbObservedThis
+NGram->[\$i]; nbObsAll \$i=\$nbObservedAllNGrams->[\$i]; total=\$totalObse
+rvedAll; nbExpected \$i=\$nbExpectedThis[\$i]; chisq = \$chiSquare[\$i]")
}

and this takes way less time (according to NYTProf). As previously said, it seems that a simple call to is_debug() (no interpolation) implies a complex (and long) computation in Log4perl.

In reply to Re^3: log4perl and efficiency by erwan
in thread log4perl and efficiency by erwan

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