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GeneralRe: memory device context coordinates Pin
Alexander Kindel6-Feb-19 13:44
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AnswerRe: memory device context coordinates Pin
leon de boer6-Feb-19 15:55
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GeneralRe: memory device context coordinates Pin
Alexander Kindel7-Feb-19 23:23
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GeneralRe: memory device context coordinates Pin
leon de boer8-Feb-19 21:43
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AnswerRe: memory device context coordinates Pin
Alexander Kindel8-Feb-19 9:22
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QuestionMenu bar on title bar of application Pin
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QuestionChanged CMDIChildWnd to CMDIChildWndEx: does not show anything inside the frame Pin
Dansveen4-Feb-19 2:02
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Question_findfirst and fopen very slow Pin
cristiapi31-Jan-19 1:13
membercristiapi31-Jan-19 1:13 
I have about 1800 text files in a dir and their number is slowly growing (several files in a day). The size of a file is about 40 kB.
I need to enumerate all the file with the ".states" extension, open the file, check to see if there is a line that starts with a particular sequence of 4 chars and if the line exists, I save the line in a std::vector.

I use the following code, but it takes very long time at the first run (the subsequent runs are very fast):
struct _finddata_t fd; long hFile;
if((hFile=_findfirst("*.states", &fd))== -1L) return; // File not found
do {
    FILE *f= fopen(fd.name, "rS");
    while(fgets(buf, sizeof(buf), f)) {
        if(0 == _strnicmp(buf, "ABCD", 4)) {
            Save buf in a std::vector
            break;
        }
    }
    fclose(f);
} while(_findnext(hFile, &fd) == 0);
_findclose(hFile);

Is there any way to speedup the code?

If I merge all the files in a single file, I solve the problem, but I prefer to keep all the original files.
QuestionRe: _findfirst and fopen very slow Pin
David Crow31-Jan-19 3:50
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AnswerRe: _findfirst and fopen very slow Pin
cristiapi31-Jan-19 3:58
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QuestionRe: _findfirst and fopen very slow Pin
David Crow31-Jan-19 4:23
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AnswerRe: _findfirst and fopen very slow Pin
cristiapi31-Jan-19 5:34
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QuestionRe: _findfirst and fopen very slow Pin
David Crow31-Jan-19 6:01
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AnswerRe: _findfirst and fopen very slow Pin
cristiapi31-Jan-19 6:07
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GeneralRe: _findfirst and fopen very slow Pin
David Crow31-Jan-19 6:14
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QuestionRe: _findfirst and fopen very slow Pin
jeron131-Jan-19 4:58
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AnswerRe: _findfirst and fopen very slow Pin
cristiapi31-Jan-19 5:20
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QuestionRe: _findfirst and fopen very slow Pin
David Crow31-Jan-19 6:04
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AnswerRe: _findfirst and fopen very slow Pin
cristiapi31-Jan-19 6:10
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GeneralRe: _findfirst and fopen very slow Pin
jeron131-Jan-19 8:28
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GeneralRe: _findfirst and fopen very slow Pin
cristiapi1-Feb-19 5:57
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AnswerRe: _findfirst and fopen very slow Pin
Randor 31-Jan-19 14:23
professional Randor 31-Jan-19 14:23 
GeneralRe: _findfirst and fopen very slow Pin
cristiapi1-Feb-19 0:29
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AnswerRe: _findfirst and fopen very slow Pin
leon de boer31-Jan-19 14:54
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GeneralRe: _findfirst and fopen very slow Pin
Stefan_Lang31-Jan-19 21:36
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