Java Edition 15w35a

15w35a is the fourteenth snapshot released for 1.9.

Changes

 * Zombies
 * Zombie villagers now have different textures based on their profession and career.
 * New  tag for zombie villagers is used to determine what profession the zombie is represented as, as well as what profession it will become when cured.
 * Mobs
 * Cows, chickens, sheep, and pigs now run faster and in straight lines instead of circles when hurt.
 * Command Blocks
 * Now have an option of "Needs Redstone" or "Always Active."
 * "Needs Redstone" is the previous behavior.
 * "Always Active" causes the command block to always behave as if it was powered.
 * Also changeable via the  NBT tag for all command blocks.
 * New textures for command blocks.
 * Darkened outlines on the center shapes.
 * The back of the arrow texture is now curved when the command block is set to conditional.
 * Combat
 * Shovel base attack damage reduced from 4.5 to 2.5.
 * Pickaxe attack speed reduced from 1.5 to 1.2.
 * Axe base attack damage reduced from 8 to 7.
 * Axe attack speed increased from 0.85 to 0.9.
 * This slightly reduces the damage per second.
 * Hoe attack damage is now always 1.
 * Hoe attack speed now increases by 1 every tier, starting at 1.


 * Optimization
 * Experimental performance enhancements.
 * Fixed client memory leaks.
 * Attributes
 * The  string tag within   determines which slot the modifier is applied to.
 * Available slots are: "mainhand", "offhand", "feet", "legs", "torso", "head".
 * Example: