哈希表...再次 [英] hash table...again
问题描述
首先，我想原谅自己写这个小组，尽管我知道这不是一个标准的C ++问题。我写信给
microsoft.public.dotnet.lang.vc但似乎没有人回答我，并且
这是非常紧急的。 />
无论如何，我有这样的事情：
hash_map< double，intmapa;
double md = 0;
for（int j = 0; j< 1000000; ++ j）
{
mapa [md] = 3;
md ++;
}
和你一样我可以看到，我只是试图散列很多数据。我的问题是
这耗费了70 MB的内存，这在我看来有点太多了。任何想法
出了什么问题？
再次，对不起是非正式的
-
你永远不会太年轻，没有越南闪回
first of, i''d like to excuse myself for writing in this group, even though i
know this is not a standard C++ question. i''ve written to
microsoft.public.dotnet.lang.vc but no one seems to be answering me, and
it''s pretty urgent.
any way, i have something like this:
hash_map<double, intmapa;
double md = 0;
for(int j=0;j<1000000;++j)
{
mapa[md] = 3;
md++;
}
as you can see, i''m simply trying to hash a lot of data. my problem is that
this uses up 70 MB of memory,which seems to me a bit too much. any ideas
what went wrong?
again, sorry for being offtopic
--
You''re never too young to have a Vietnam flashback
推荐答案
filox写道：
filox wrote:
首先，我想原谅自己写这个小组，尽管我知道这不是一个标准的C ++问题。我写信给
microsoft.public.dotnet.lang.vc但似乎没有人回答我，并且
这是非常紧急的。
first of, i''d like to excuse myself for writing in this group, even though i
know this is not a standard C++ question. i''ve written to
microsoft.public.dotnet.lang.vc but no one seems to be answering me, and
it''s pretty urgent.
实际上，这不是偏离主题的。 FAQ 5.9说这里的主题是
标准C ++语言和库以及计划扩展和
调整。 TR1，标准库的一些计划扩展，
包括unordered_map，它（我相信）与
hash_map基本相同，但名称不同，以免造成
代码使用您正在使用的常用扩展程序的问题。
Actually, it''s not off-topic. FAQ 5.9 says that the topic here is the
standard C++ language and libraries and "planned extensions and
adjustments." TR1, some planned extensions to the standard library,
includes unordered_map, which is (I believe) essentially the same as
hash_map but with a different name so as not to cause problems with
code using the common extension you are using.
无论如何，我有类似的东西：
hash_map< double，intmapa;
double md = 0;
for（int j = 0; j< 1000000; ++ j）
{
mapa [md] = 3;
md ++;
}
你可以看到，我只是试图散列很多数据。我的问题是
这耗费了70 MB的内存，这在我看来有点太多了。任何想法
出了什么问题？
any way, i have something like this:
hash_map<double, intmapa;
double md = 0;
for(int j=0;j<1000000;++j)
{
mapa[md] = 3;
md++;
}
as you can see, i''m simply trying to hash a lot of data. my problem is that
this uses up 70 MB of memory,which seems to me a bit too much. any ideas
what went wrong?
你怎么知道它需要70 MB？
干杯！ --M
How do you know it takes 70 MB?
Cheers! --M
" mlimber" < ml ***** @ gmail.com写信息
news：11 ******************** @ e64g2000cwd.googlegrou ps .com ...
"mlimber" <ml*****@gmail.comwrote in message
news:11********************@e64g2000cwd.googlegrou ps.com...
filox写道：
filox wrote:
>首先，我想要原谅自己写这个小组，甚至
虽然我知道这不是一个标准的C ++问题。我写信给
microsoft.public.dotnet.lang.vc，但似乎没有人回答我，而且这很紧急。
>first of, i''d like to excuse myself for writing in this group, even
though i
know this is not a standard C++ question. i''ve written to
microsoft.public.dotnet.lang.vc but no one seems to be answering me, and
it''s pretty urgent.
实际上，这不是偏离主题的。 FAQ 5.9说这里的主题是
标准C ++语言和库以及计划扩展和
调整。 TR1，标准库的一些计划扩展，
包括unordered_map，它（我相信）与
hash_map基本相同，但名称不同，以免造成
代码使用您正在使用的常用扩展程序的问题。
Actually, it''s not off-topic. FAQ 5.9 says that the topic here is the
standard C++ language and libraries and "planned extensions and
adjustments." TR1, some planned extensions to the standard library,
includes unordered_map, which is (I believe) essentially the same as
hash_map but with a different name so as not to cause problems with
code using the common extension you are using.
>无论如何，我有类似的东西：
hash_map< double，intmapa;
double md = 0;
for（int j = 0; j< 1000000; ++ j）
{
mapa [md] = 3;
md ++;
}
你可以看，我只是试图散列很多数据。我的问题是
这耗费了70 MB的内存，这在我看来有点太多了。任何想法
出了什么问题？
>any way, i have something like this:
hash_map<double, intmapa;
double md = 0;
for(int j=0;j<1000000;++j)
{
mapa[md] = 3;
md++;
}
as you can see, i''m simply trying to hash a lot of data. my problem is
that
this uses up 70 MB of memory,which seems to me a bit too much. any ideas
what went wrong?
你怎么知道需要70 MB？
How do you know it takes 70 MB?
因为Windows任务管理器这么说......
because the windows task manager says so...
filox写道：
filox wrote:
" mlimber" < ml ***** @ gmail.comwrote
"mlimber" <ml*****@gmail.comwrote
你怎么知道它需要70 MB？
How do you know it takes 70 MB?
，因为Windows任务管理器这样说...
because the windows task manager says so...
>从什么我已经读过，任务管理器不是
的可信赖来源
>From what I''ve read, the Task Manager is not a trustworthy source of
有关此计数的信息。询问有关计算内存的可靠方法
在Windows新闻组中的使用情况，一旦您对
数字有信心，请在必要时再次询问。
干杯！ --M
information on this count. Ask about reliable ways to calculate memory
usage in a Windows newsgroup, and once you are confident in the
numbers, ask here again if necessary.
Cheers! --M
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