Sliding Sync: Speed up incremental sync by avoiding extra work #3043

Job	Run time
changes	9s
changes	9s
check-lockfile	10s
check-lockfile	10s
lint-crlf	3s
lint-crlf	3s
lint-newsfile	35s
lint-newsfile	35s
lint	21s
lint	21s
check-sampleconfig	46s
check-sampleconfig	46s
Typechecking	1m 38s
Typechecking	1m 38s
check-schema-delta	38s
check-schema-delta	38s
lint-pydantic	52s
lint-pydantic	52s
lint-clippy	0s
lint-clippy	0s
lint-clippy-nightly	0s
lint-clippy-nightly	0s
lint-readme	0s
lint-readme	0s
lint-rustfmt	0s
lint-rustfmt	0s
linting-done	2s
linting-done	2s
calculate-test-jobs	8s
calculate-test-jobs	8s
trial-olddeps	8m 8s
trial-olddeps	8m 8s
portdb (3.8, 11)	3m 7s
portdb (3.8, 11)	3m 7s
complement (monolith, SQLite)	12m 36s
complement (monolith, SQLite)	12m 36s
portdb (3.11, 15)	3m 2s
portdb (3.11, 15)	3m 2s
complement (monolith, Postgres)	14m 10s
complement (monolith, Postgres)	14m 10s
cargo-bench	0s
cargo-bench	0s
complement (workers, Postgres)	20m 39s
complement (workers, Postgres)	20m 39s
cargo-test	0s
cargo-test	0s
trial-pypy	0s
trial-pypy	0s
trial (3.8, sqlite, all)	5m 35s
trial (3.8, sqlite, all)	5m 35s
sytest (focal)	8m 45s
sytest (focal)	8m 45s
trial (3.8, postgres, 11, all)	13m 14s
trial (3.8, postgres, 11, all)	13m 14s
sytest (focal, postgres)	10m 6s
sytest (focal, postgres)	10m 6s
trial (3.8, sqlite)	5m 5s
trial (3.8, sqlite)	5m 5s
sytest (focal, multi-postgres, workers)	13m 4s
sytest (focal, multi-postgres, workers)	13m 4s
sytest (focal, multi-postgres, workers, asyncio)	36m 29s
sytest (focal, multi-postgres, workers, asyncio)	18m 59s
export-data	2m 18s
export-data	2m 18s
tests-done	2s
tests-done	3s
	5h 5m 55s

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