Java Edition 15w34a

15w34a is the tenth snapshot released for 1.9.

Changes

 * Combat
 * New “attack strength” combat mechanic
 * A meter shows up after switching items or attacking depending on the new attack indicator option in video settings
 * Damage done depends on the fullness of the meter.
 * Fills in 0.25s for non-weapons, 0.8s for swords, pickaxes, and shovels, and 1.2s for axes.
 * Can be displayed next to the hotbar (left or right based on the player's main hand), under the crosshair or turned off
 * Delay when selecting a sword, pickaxe, axe or shovel into the main hand
 * Maps
 * Maps now start at a more useful zoom level (1:4)
 * New recipe for zooming in on a map: craft shears and a map together in any shape
 * Zooms in on the lower-right quadrant of the original map.
 * Command blocks
 * Command block contraptions from earlier versions will still work
 * New textures that now vary depending on what direction they are placed, similar to logs and pistons
 * 3 Modes: impulse, chain, and repeat - color changes based on mode
 * Impulse mode (orange): Command is run on rising edge
 * Same behavior and color as previous versions
 * Chain mode (green): Command is run whenever a command block pointing into this command block executes while this command block is powered - chain signal is forwarded even through disabled chain command blocks
 * Repeat mode (blue): Command is run every game tick while powered
 * Each new mode has its own block id and is obtainable with /give and pickblock
 * Animated texture: The colored pixels in the middle change color
 * Poweredness is now a data tag, allowing command blocks to stay enabled without needing redstone blocks next to them
 * Done button is available even when the command line is empty
 * Zombies and zombie pigmen
 * Now lift their arms when becoming hostile
 * Giants
 * No longer renders the model
 * Still can be summoned using commands
 * Optimizations
 * Optimized mob AI, path finding and block ticking
 * 15% tick speed increase on 16 render distance