Gradually increasing lag until complete freeze

• Problem began occurring after Feb 14.
• During play, game starts initially fine, but begins to lag and jump. Lag increases over time until it completely freezes up.
• Seems to occur on surface. While mining, lag was minimal unless in open cave. But on surface, the further you move around the lore it chops.
• Occurs in every saved world
• Created a new world, problem still occurs.
• Tried 1.8,1.8.1, 1.8.2 and 1.8.3. Problem exists in all versions.
• Updated Java to V8, no change