glTexImage2D take long time in some PCs

Question

Background:

1. Use DXVA2 to decode 4K 30FPS video,then pass the decoded frames directly to opengl for render.
2. The framework is GPU decode(DXVA2) then GPU render(Opengl),without copy back to CPU.

Problem:

1. I found in some PCs glTexImage2D take too long time(140ms).One PC's GPU is intel HD 5500 + Nivida GeFoce 940M.
2. But in some PCs it only takes 16ms.One PC's GPU is intel HD 5500 + AMD R7 M260.
3. All the PCs have the latest gpu driver updated.

SourceCode:

Below is DXVA2 decode source code.

static int dxva2_retrieve_data(AVCodecContext *s, AVFrame *frame)
{
    LPDIRECT3DSURFACE9 surface =  (LPDIRECT3DSURFACE9)frame->data[3];
    InputStream        *ist = (InputStream *)s->opaque;
    DXVA2Context       *ctx = (DXVA2Context*)ist->hwaccel_ctx;
    D3DSURFACE_DESC    surfaceDesc;
    D3DLOCKED_RECT     LockedRect;
    HRESULT            hr;
    int                ret;

    IDirect3DSurface9_GetDesc(surface, &surfaceDesc);

    hr = IDirect3DSurface9_LockRect(surface, &LockedRect, NULL, D3DLOCK_READONLY);
    if (FAILED(hr)) {
        av_log(NULL, AV_LOG_ERROR, "Unable to lock DXVA2 surface\n");
        return AVERROR_UNKNOWN;
    }

    picture->data[0] = (uint8_t*)LockedRect.pBits;
    picture->data[1] = (uint8_t*)LockedRect.pBits + LockedRect.Pitch * surfaceDesc.Height;
    frameWidth = frame->width;
    frameHeight = frame->height;
    //glFinish() <---- commentee suggestion
    DWORD start = GetTickCount();//test time
    Draw();//opengl draw        
    //glFinish() <---- commentee suggestion
    DWORD end = GetTickCount();//test time
    printf("draw time:%d\n", end - start);//test time
    start = end - start;
    picture->data[0] = nullptr;
    picture->data[1] = nullptr;

    IDirect3DSurface9_UnlockRect(surface);
    return 0;
fail:
    return ret;
}

Below is Draw function's code.

void Draw()
{
    glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
    glClearDepth(1.0f);
    glClear(GL_COLOR_BUFFER_BIT);
    glShadeModel(GL_SMOOTH);

    glClearColor(0.0, 255, 0.0, 0.0);
    glClear(GL_COLOR_BUFFER_BIT);

    glUseProgram(g_program);
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, g_texture[0]);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, frameWidth, frameHeight, 0, GL_RED, GL_UNSIGNED_BYTE, picture->data[0]);
    glUniform1i(y, 0);

    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, g_texture[1]);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, frameWidth / 2, frameHeight / 2, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, picture->data[1]);
    glUniform1i(uv, 1);

    DrawHorizontal();

    glBindVertexArray(0);
    glUseProgram(0);
    glBindTexture(GL_TEXTURE_2D, 0);
}

Question：

Who can tell me why the same code have the different result at different PCs? Or give me some advices?