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Kirill Smelkov
cpython
Commits
6c1908d5
Commit
6c1908d5
authored
Dec 26, 2005
by
Georg Brandl
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Bug #489256: remove note about Python 1.1 profiler
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Doc/lib/libprofile.tex
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6c1908d5
...
@@ -55,47 +55,47 @@ examine the results of a profile operation.
...
@@ -55,47 +55,47 @@ examine the results of a profile operation.
\index
{
profiling, deterministic
}
\index
{
profiling, deterministic
}
\section
{
How Is This Profiler Different From The Old Profiler?
}
%
\section{How Is This Profiler Different From The Old Profiler?}
\nodename
{
Profiler Changes
}
%
\nodename{Profiler Changes}
%
(This section is of historical importance only; the old profiler
%
(This section is of historical importance only; the old profiler
discussed here was last seen in Python 1.1.)
%
discussed here was last seen in Python 1.1.)
%
The big changes from old profiling module are that you get more
%
The big changes from old profiling module are that you get more
information, and you pay less CPU time. It's not a trade-off, it's a
%
information, and you pay less CPU time. It's not a trade-off, it's a
trade-up.
%
trade-up.
%
To be specific:
%
To be specific:
%
\begin{description}
%
\begin{description}
%
\item
[Bugs removed:]
%
\item[Bugs removed:]
Local stack frame is no longer molested, execution time is now charged
%
Local stack frame is no longer molested, execution time is now charged
to correct functions.
%
to correct functions.
%
\item
[Accuracy increased:]
%
\item[Accuracy increased:]
Profiler execution time is no longer charged to user's code,
%
Profiler execution time is no longer charged to user's code,
calibration for platform is supported, file reads are not done
\emph
{
by
}
%
calibration for platform is supported, file reads are not done \emph{by}
profiler
\emph
{
during
}
profiling (and charged to user's code!).
%
profiler \emph{during} profiling (and charged to user's code!).
%
\item
[Speed increased:]
%
\item[Speed increased:]
Overhead CPU cost was reduced by more than a factor of two (perhaps a
%
Overhead CPU cost was reduced by more than a factor of two (perhaps a
factor of five), lightweight profiler module is all that must be
%
factor of five), lightweight profiler module is all that must be
loaded, and the report generating module (
\module
{
pstats
}
) is not needed
%
loaded, and the report generating module (\module{pstats}) is not needed
during profiling.
%
during profiling.
%
\item
[Recursive functions support:]
%
\item[Recursive functions support:]
Cumulative times in recursive functions are correctly calculated;
%
Cumulative times in recursive functions are correctly calculated;
recursive entries are counted.
%
recursive entries are counted.
%
\item
[Large growth in report generating UI:]
%
\item[Large growth in report generating UI:]
Distinct profiles runs can be added together forming a comprehensive
%
Distinct profiles runs can be added together forming a comprehensive
report; functions that import statistics take arbitrary lists of
%
report; functions that import statistics take arbitrary lists of
files; sorting criteria is now based on keywords (instead of 4 integer
%
files; sorting criteria is now based on keywords (instead of 4 integer
options); reports shows what functions were profiled as well as what
%
options); reports shows what functions were profiled as well as what
profile file was referenced; output format has been improved.
%
profile file was referenced; output format has been improved.
%
\end{description}
%
\end{description}
\section
{
Instant Users Manual
\label
{
profile-instant
}}
\section
{
Instant Users Manual
\label
{
profile-instant
}}
...
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