c# - Foreach loop causing lag? -


in previous question here. found out how read , draw level each frame image.

now have inputted player class, player moves choppy despite code not doing so. know because if comment level reading code out, player moves fine.

i think it's foreach loop doing this. have no idea , appreciated!

just save time clicking, here's successful level-reading code.

public void readlevel(string path, graphicsdevice graphics) {      //get array of colors     texture2d level = content.load<texture2d>(path);     color[] colors = new color[level.width * level.height];     level.getdata(colors);      //read each pixel , draw level     color brickrgb = new color(128, 128, 128);     color blankrgb = new color(87, 0, 127);      int placex = 0;     int placey = 0;      foreach (color pixel in colors)     {         spritebatch spritebatch = new spritebatch(graphics);         spritebatch.begin();          if (pixel == brickrgb)         {             texture2d brick = content.load<texture2d>("blocks/brick");             spritebatch.draw(brick, new rectangle(placex, placey, 40, 40), color.white);              rectangle rect = new rectangle(placex, placey, 40, 40);             blocks.add(rect);         }         else if (pixel == blankrgb)         {             texture2d = content.load<texture2d>("titlescreen/back");             spritebatch.draw(back, new rectangle(placex, placey, 40, 40), color.white);         }          if (placex == 840)         {             placex = 0;             placey += 40;         }         else placex += 40;         spritebatch.end();     } }

game.cs:

class game {     player player;     levelreader reader;     int level = 1;      public game(contentmanager content)     {         reader = new levelreader(content);         player = new player(content);     }      public void update()     {         player.update();     }     public void draw(graphicsdevice graphics)     {         reader.readlevel("levels/l" + level, graphics);         player.draw(graphics);      } }

you might want move calls spritebatch.begin() , spritebatch.end() outside of loop. 

spritebatch spritebatch = new spritebatch(graphics);         spritebatch.begin(); foreach (color pixel in colors)     {           if (pixel == brickrgb)         {             texture2d brick = content.load<texture2d>("blocks/brick");             spritebatch.draw(brick, new rectangle(placex, placey, 40, 40), color.white);              rectangle rect = new rectangle(placex, placey, 40, 40);             blocks.add(rect);         }         else if (pixel == blankrgb)         {             texture2d = content.load<texture2d>("titlescreen/back");             spritebatch.draw(back, new rectangle(placex, placey, 40, 40), color.white);         }          if (placex == 840)         {             placex = 0;             placey += 40;         }         else placex += 40;      } spritebatch.end();

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