c# - .NET's Stopwatch Class, behaves strange -

-

so, have search algorithms, , sending random 20000 numbers each algorithm, trying figure out how long each take. 

        public void functionsforsorts(int[] array)     {         stopwatch sw = new stopwatch();         long elapsedtime = sw.elapsedticks;          if (array.length == 20000)          {             sw.start();             bubblesort.bubble(array);             sw.stop();             elapsedtime = sw.elapsedmilliseconds;             label1.text += "\t" + elapsedtime.tostring() + " miliseconds ";             application.doevents();              sw.restart();             selectionsort.selection(array);             sw.stop();             elapsedtime = sw.elapsedmilliseconds;             label2.text += "\t" + elapsedtime.tostring() + " miliseconds ";             application.doevents();              sw.restart();             insertionsort.insertion(array);             sw.stop();             elapsedtime = sw.elapsedmilliseconds;             label3.text += "\t" + elapsedtime.tostring() + " miliseconds ";             application.doevents();              sw.restart();             mergesort.mergesort(array, 0, array.length - 1);             sw.stop();             elapsedtime = sw.elapsedmilliseconds;             label4.text += "\t" + elapsedtime.tostring() + " miliseconds ";             application.doevents();              sw.restart();             shellsort.shell(array);             sw.stop();             elapsedtime = sw.elapsedmilliseconds;             label5.text += "\t" + elapsedtime.tostring() + " miliseconds ";             application.doevents();              sw.restart();             quicksort.quicksort(array, 0, array.length - 1);             sw.stop();             elapsedtime = sw.elapsedmilliseconds;             label6.text += "\t" + elapsedtime.tostring() + " miliseconds ";             application.doevents();         }

the problem stopwatch won't give proper results, works ok bubble sort, selection sort , merge sort, don't know why, writes 0 insertionsort, though has proper value while debugging.and doesnt give proper values shell sort , quick sort too.

another awkward part this, when comment out bubble , selection sort, insertion give proper results, true algorithms, if make them 1st 1 in order, im getting proper results, showed friends, don't have clue either, doesn't make sense @ all...

if array sorted, it's possible insertion sort had nothing , finished in less 1 millisecond. possible if previous sort left array sorted.

(edit - apparently have hard time typing word "possible" instead of "possibly"... corrected.)


Comments

Post a Comment

Popular posts from this blog

ruby - Trying to change last to "x"s to 23 -

-
i have been playing around irb , have string looks this: irb(main):072:0> puts ["[\"4354 5432 5432 xxxxx\", \"6547 6547 8543 xxxxx\", \"2344 6543 6674 xxxxx\", \"2346 6236 7543 xxxxx\", \"1273 5585 5587 xxxxx\"]"] => nil irb(main):073:0> what want gsub last 2 "x" s of each 17 digit combination, 23 . what i've tried far (i've been using rubular): a.gsub(/\d[x]/,"23") <= grabs "x" s i'm close a.gsub(/\w[x{2}]/,"23") <= grabs "x" s grabs two digits each combination. is there easier way i'm not understanding? a.gsub(/\d{4} \d{4} \d{4} xxx\kxx/, '23') \d{4} = 4 digits what \k drop matched far. can use don't replace entire number, still able validate have in desired format.
Read more

jquery - Clone last and append item to closest class -

-
this bare-bones code on page: <div class="list-container"> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> </div> <p><button class="add-list-item">add</button></p> <div class="list-container"> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> </div> <p><button class="add-list-item">add</button></p> <di
Read more

c - Unrecognised emulation mode: elf_i386 on MinGW32 -

-
i'm trying make kernel, , cannot link c output assembly. ld . i'm getting error: unrecognized emulation mode: elf_i386 i'm using windows 10 professional mingw32 , msys. code using: link.ld /* * link.ld */ output_format(elf32-i386) entry(start) sections { . = 0x100000; .text : { *(.text) } .data : { *(.data) } .bss : { *(.bss) } } kernel.c /* * kernel.c */ void kmain(void) { const char *str = "my first kernel"; char *vidptr = (char*)0xb8000; //video mem begins here. unsigned int = 0; unsigned int j = 0; /* loops clears screen * there 25 lines each of 80 columns; each element takes 2 bytes */ while(j < 80 * 25 * 2) { /* blank character */ vidptr[j] = ' '; /* attribute-byte - light grey on black screen */ vidptr[j+1] = 0x07; j = j + 2; } j = 0; /* loop writes string video memory */ while(str[j] != '\0') { /
Read more