Time Tiler
Time Tiler instantly creates a configurable grid of tiles, each referencing a different point in time for a specified clip.
Its many animatable parameters can instantly generate effects that would take hours to set up in After Effects.

Layer Select the movie layer (or pre-comp) to use as the source for the effect. For best results, this layer should last at least the entire duration of the comp.
Frame Selection The method used to select the tiled frames.
Equal Distribution: Divides the source clip evenly by the number of tiles.
Sequential: Uses the Sequential Time Offset to offset time in sequence from the current frame for each tile.
Random: Uses the Random Seed parameter to select random points in time from the clip.
Global Time Offset Offsets the current time of each tile by the specified duration.
Sequential Time Offset Sets the time distance between successive tiles in Sequential Mode.
Rows Sets the number of rows in the grid.
Columns Sets the number of columns in the grid.
Looping Sets the looping behavior for tiles that reach the beginning or end of the clip.
Standard: Loops back to the beginning when the end is reached, and vice-versa.
Ping-Pong: Reverses time when a tile reaches the beginning or end of the clip.
Zoom Into Tile # Selects a Tile ID to zoom into. Tiles are indexed left to right, top to bottom.
Zoom Zooms into the selected tile, making it full-frame.
Random Seed Randomizes the distribution of frames for Random Mode.

Time Tiler locks to the length of the comp, not the movie layer, so be sure the movie layer can fill the comp, or there will be missing tiles.
Sequential Mode is the fastest, especially once you have rendered enough frames to fill the Sequential Offset. At that point, everything is cached (provided you have enough RAM), and can render very fast.
You can use Frame Blending when Time Tiler is applied directly to a clip, but it takes a little longer to render. Disable it unless you absolutely need it
Maxed out, Time Tiler has to decompress and composite 256 frames per frame, which can be somewhat slow. For maximum speed, try this:
Render out the movie layer as a small proxy (preferably as small as the tiles will be).

Create a new Solid, and apply Time Tiler. Then choose the proxy layer.
By not having to decompress & cache full-resolution footage, the speed is greatly improved, and you won't lose any resolution in the end.
Apply grid-based effects after Time Tiler, such as DT Mosaic Trans, DT Stripper, DT Tile Puzzle, Card Wipe, etc. In Random Mode, animate the Random Seed parameter in time with a soundtrack for impact.