How to replace string with StringBuilder
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Hi, In my application I am very much using the System.string class for every manipulation of characters (Reading a lot of data from a XML file, writing a lot of data in a XML file and creating log for each operation). If my application needs to run for 24 hours, I know how inefficient it can be using System.string. :(( How can I replace System.string with StringBuilder? Like in System.Xml.XmlElement object, its inner member InnerText is itself a System.string object. Similarly in System.Xml.XmlNode object, its inner member InnerText is also a System.string object. So when too many classes of .net framework are using System.string type for their members (instead of StringBuilder), how can I replace System.string with StringBuilder? I am not getting any clue to come out of this problem. Even if I use StringBuilder, too many .net classes do not accept it. Using System.string or StringBuilder.ToString() can make my application really inefficient. Please help me to know how to go about it? Also let me know when System.string get collected by Garbage Collector? Thanks in Advance Aseem
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Hi, In my application I am very much using the System.string class for every manipulation of characters (Reading a lot of data from a XML file, writing a lot of data in a XML file and creating log for each operation). If my application needs to run for 24 hours, I know how inefficient it can be using System.string. :(( How can I replace System.string with StringBuilder? Like in System.Xml.XmlElement object, its inner member InnerText is itself a System.string object. Similarly in System.Xml.XmlNode object, its inner member InnerText is also a System.string object. So when too many classes of .net framework are using System.string type for their members (instead of StringBuilder), how can I replace System.string with StringBuilder? I am not getting any clue to come out of this problem. Even if I use StringBuilder, too many .net classes do not accept it. Using System.string or StringBuilder.ToString() can make my application really inefficient. Please help me to know how to go about it? Also let me know when System.string get collected by Garbage Collector? Thanks in Advance Aseem
Hi, StringBuilder is Benificial in case of string manipulations like concat string for no of times. Then use StringBuilder and add method to create result string. But when you got final string then You can use String object.
Best Regards, Chetan Patel
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Hi, In my application I am very much using the System.string class for every manipulation of characters (Reading a lot of data from a XML file, writing a lot of data in a XML file and creating log for each operation). If my application needs to run for 24 hours, I know how inefficient it can be using System.string. :(( How can I replace System.string with StringBuilder? Like in System.Xml.XmlElement object, its inner member InnerText is itself a System.string object. Similarly in System.Xml.XmlNode object, its inner member InnerText is also a System.string object. So when too many classes of .net framework are using System.string type for their members (instead of StringBuilder), how can I replace System.string with StringBuilder? I am not getting any clue to come out of this problem. Even if I use StringBuilder, too many .net classes do not accept it. Using System.string or StringBuilder.ToString() can make my application really inefficient. Please help me to know how to go about it? Also let me know when System.string get collected by Garbage Collector? Thanks in Advance Aseem
StringBuilder is only going to be more efficient than a string if: 1) It never gets extended - each time it does, it gets re-allocated, just like a string. 2) If your code repeatedly changes the string content. If you are allocating strings and keeping them allocated, then replacing them with StringBuilder (which you can't do for System.Xml objects) will not make any real improvement unless you overwrite the StringBuilder content. How are you allocating / using the strings? If you app is running for 24 hours, what happens? Strings are collected by the GC when it feels like it (i.e. when it needs to make some space for a new allocation), but will only be collected when there are no further references to them.
If Barbie is so popular, why do you have to buy her friends? Eagles may soar, but weasels don't get sucked into jet engines. If at first you don't succeed, destroy all evidence that you tried.
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Hi, In my application I am very much using the System.string class for every manipulation of characters (Reading a lot of data from a XML file, writing a lot of data in a XML file and creating log for each operation). If my application needs to run for 24 hours, I know how inefficient it can be using System.string. :(( How can I replace System.string with StringBuilder? Like in System.Xml.XmlElement object, its inner member InnerText is itself a System.string object. Similarly in System.Xml.XmlNode object, its inner member InnerText is also a System.string object. So when too many classes of .net framework are using System.string type for their members (instead of StringBuilder), how can I replace System.string with StringBuilder? I am not getting any clue to come out of this problem. Even if I use StringBuilder, too many .net classes do not accept it. Using System.string or StringBuilder.ToString() can make my application really inefficient. Please help me to know how to go about it? Also let me know when System.string get collected by Garbage Collector? Thanks in Advance Aseem
Well, StringBuilder is used when you want to build up a big string by concatinating small bits together. It's used as strings are immutable, that is they can't be changed. So, if you add two strings together, a third is created and the contents of both are copied over. Obviously this causes problems if you do it repeatedly, and StringBuilder exists to mitigate this performance problem. In terms of GC, I believe that strings are collected in the normal manner like any other object, that is at some undeterminate point after all references to it no longer exist.
Regards, Rob Philpott.
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Hi, In my application I am very much using the System.string class for every manipulation of characters (Reading a lot of data from a XML file, writing a lot of data in a XML file and creating log for each operation). If my application needs to run for 24 hours, I know how inefficient it can be using System.string. :(( How can I replace System.string with StringBuilder? Like in System.Xml.XmlElement object, its inner member InnerText is itself a System.string object. Similarly in System.Xml.XmlNode object, its inner member InnerText is also a System.string object. So when too many classes of .net framework are using System.string type for their members (instead of StringBuilder), how can I replace System.string with StringBuilder? I am not getting any clue to come out of this problem. Even if I use StringBuilder, too many .net classes do not accept it. Using System.string or StringBuilder.ToString() can make my application really inefficient. Please help me to know how to go about it? Also let me know when System.string get collected by Garbage Collector? Thanks in Advance Aseem
You can't change the return values of framework object methods (and indeed, you don't want to) . In your own object methods, you can use
StringBuilderinternally if necessary, but unless you have a very specific reason for doing so, there's really no reason to return aStringBuilderobject. AStringBuilderis a more efficient object when frequent changes to a given string are made, but it saves you nothing as a return value unless the method being returned to is also going to heavily modify the returned value. If you're concerned with memory usage, buy a memory profiler, and run your app for a few days to see if this is indeed something that even needs to be considered. You may find that your efforts are best concentrated elsewhere in the code..45 ACP - because shooting twice is just silly
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Hi, StringBuilder is Benificial in case of string manipulations like concat string for no of times. Then use StringBuilder and add method to create result string. But when you got final string then You can use String object.
Best Regards, Chetan Patel
Thanks
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StringBuilder is only going to be more efficient than a string if: 1) It never gets extended - each time it does, it gets re-allocated, just like a string. 2) If your code repeatedly changes the string content. If you are allocating strings and keeping them allocated, then replacing them with StringBuilder (which you can't do for System.Xml objects) will not make any real improvement unless you overwrite the StringBuilder content. How are you allocating / using the strings? If you app is running for 24 hours, what happens? Strings are collected by the GC when it feels like it (i.e. when it needs to make some space for a new allocation), but will only be collected when there are no further references to them.
If Barbie is so popular, why do you have to buy her friends? Eagles may soar, but weasels don't get sucked into jet engines. If at first you don't succeed, destroy all evidence that you tried.
Earlier I was under a wrong concept that System.Strings are not collected by GC. Thanks for correcting me.
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Earlier I was under a wrong concept that System.Strings are not collected by GC. Thanks for correcting me.
You are welcome! Everything is subject to the GC as soon as it's last reference is removed.
If Barbie is so popular, why do you have to buy her friends? Eagles may soar, but weasels don't get sucked into jet engines. If at first you don't succeed, destroy all evidence that you tried.
