Re: Directory recursive walking

[dog2002 via Digitalmars-d-learn]

On Friday, 15 January 2021 at 06:15:06 UTC, dog2002 wrote:
On Thursday, 14 January 2021 at 22:28:19 UTC, Paul Backus wrote:
On Thursday, 14 January 2021 at 20:23:37 UTC, dog2002 wrote:
[...]

What code are you using to copy the bytes? If you're reading 
the whole file into memory at once, that will consume a lot of 
memory.

void func(string inputFile, string outFile, uint chunk_size) {
        try {
                File _inputFile = File(inputFile, "r");
                File _outputFile = File(outFile, "w");
                
                ubyte[] tempBuffer = _inputFile.rawRead(new ubyte[](512));
        
                //doing some operations with the tempBuffer     

                _outputFile.rawWrite(tempBuffer);
                
                _inputFile.seek(tempBuffer.length, SEEK_SET);
                
                
                foreach(_buffer; _inputFile.byChunk(chunk_size)) {
                        _outputFile.rawWrite(_buffer);
                }
                _inputFile.close();
                _outputFile.close();
        }
        catch (Throwable) {}

}

Okay, the reason is incredibly stupid: using WinMain instead of 
main causes high memory usage. I don't know why, I use the same 
code. If I replace WinMain with main, the memory consumption is 
about 6 MB.