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Changed by [EMAIL PROTECTED] http://bugzilla.ximian.com/show_bug.cgi?id=80774 --- shadow/80774 2007-02-09 15:57:06.000000000 -0500 +++ shadow/80774.tmp.7150 2007-02-09 20:12:25.000000000 -0500 @@ -1,14 +1,14 @@ Bug#: 80774 Product: Mono: Runtime Version: 1.2 -OS: +OS: unknown OS Details: Status: NEW Resolution: -Severity: +Severity: Unknown Priority: Normal Component: JIT AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] QAContact: [EMAIL PROTECTED] TargetMilestone: --- @@ -41,6 +41,19 @@ Similar speed. How often does this happen? Additional Information: + +------- Additional Comments From [EMAIL PROTECTED] 2007-02-09 20:12 ------- +I think the problem here is not the runtime but the implementation of +Dictionary`2. While System.Collections.Hashtable uses just a simple +array to hold all (key,value,hashcode)-triplets, Dictionary`2 uses an +array which holds references to linked lists. + +Dictionary`2 essantially wraps every added (key,value)-pair in a Slot +object. This takes time for allocation (and later garbage collection) +and adds an overhead of 8 bytes per object. + +Dictionary`2 should be changed to use the more efficient data +structure used in Hashtable. _______________________________________________ mono-bugs maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-bugs
