Performance

Performance

Contexta processes all blocks at the same time. This means the total time needed to build the widget equals the time of the slowest block.
If a page has 5 blocks, four with 5 rules each and one with 500 rules, you will wait quite a while for the widget to render, because the block with 500 rules takes a long time to process.
If you split that block into two blocks of 250 rules each, the widget builds in half the time, because all blocks are rendered simultaneously.