Wolfram Language Paclet Repository
Community-contributed installable additions to the Wolfram Language
JasonB`WeakCache`
ClearHistory  |
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Details and Options
Examples
(1)
Basic Examples
(1)
In[1]:=
$HistoryLength=∞;
In[2]:=
initialMem=MemoryInUse[];
Assign a large list to a variable, keeping a reference to the output in the history. Note that ending the expression in a semicolon prevents the data from being printed in the notebook but does not stop it from being stored in .
In[3]:=
list=Range[10^8];
In[4]:=
ListQ[%]
Out[4]=
True
In[5]:=
MemoryInUse[]-initialMem
Out[5]=
800002144
Clearing the variable does not clear all the memory used by the list:
In[6]:=
list=.
In[7]:=
MemoryInUse[]-initialMem
Out[7]=
800003352
By clearing the history the memory is reclaimed:
In[8]:=
 | ClearHistory |
In[9]:=
MemoryInUse[]-initialMem
Out[9]=
-560
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