Steps to reproduce: case1

1. import https://docs.google.com/spreadsheets/d/1qkbOKoOoFVA22YQxB-8RgjopDPkyGOl2/edit?usp=share_link&ouid=114351817352708928223&rtpof=true&sd=true
2. click clear button

Current Result

it takes around 1.8s

Expected result

less time

Steps to reproduce: case2

1. click fill button

Debug Info

• I found multiple cells have the same dependents, but when clearing each cell, keikai has to re-search the cell's dependent again, cannot reuse the previous dependent search results.

Workaround

use an execution scope cache

DependencyTableEx.java
use an execution scope cache Map<precedent, Set<dependent>>.

• During one execution, multiple cells might collect the same dependents, the cache can save time to locate the same dependents in one execution among multiple cells.
• But to avoid DependencyTable from depending on Execution directly, it's better to inject the cache from outside.
• it clears the cache when there is any change

inject the cache

set an execution scope cache Map from the caller
see https://github.com/zkoss/keikaicml/compare/master...keikai-679