Context: cleanup - avoid storing a copy of children

[maurerdietmar]

The new changed() signature allows accessing old_props, so there is no more need to store an additional copy of children.

[github-actions]

Visit the preview URL for this PR (updated for commit 5dbc933):

https://yew-rs-api--pr2885-cleanup-context-prov-v4so9qbh.web.app

_{(expires Sun, 02 Oct 2022 07:36:23 GMT)}

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[github-actions]

Benchmark - SSR

Yew Master

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	318.949	399.686	356.326	26.041
Hello World	10	617.163	741.239	664.355	42.525
Function Router	10	2520.633	2804.855	2617.989	101.348
Concurrent Task	10	1009.337	1014.710	1011.247	1.404

Pull Request

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	404.579	461.390	435.177	18.255
Hello World	10	671.210	830.379	731.246	43.224
Function Router	10	2526.976	3000.499	2723.606	146.573
Concurrent Task	10	1009.389	1011.651	1010.557	0.697

[github-actions]

Size Comparison

examples	master (KB)	pull request (KB)	diff (KB)	diff (%)
boids	170.354	170.352	-0.003	-0.002%
communication_child_to_parent	90.508	90.508	0	0.000%
communication_grandchild_with_grandparent	105.465	105.371	-0.094	-0.089%
communication_grandparent_to_grandchild	101.356	101.260	-0.097	-0.095%
communication_parent_to_child	87.645	87.647	+0.003	+0.003%
contexts	107.888	107.790	-0.098	-0.091%
counter	85.521	85.521	+0.001	+0.001%
counter_functional	86.049	86.050	+0.001	+0.001%
dyn_create_destroy_apps	88.425	88.427	+0.002	+0.002%
file_upload	100.101	100.101	0	0.000%
function_memory_game	163.271	163.260	-0.012	-0.007%
function_router	348.153	347.966	-0.188	-0.054%
function_todomvc	158.063	158.059	-0.005	-0.003%
futures	222.397	222.396	-0.001	-0.000%
game_of_life	105.067	105.067	0	0.000%
immutable	181.739	181.736	-0.003	-0.002%
inner_html	82.388	82.387	-0.001	-0.001%
js_callback	111.419	111.418	-0.001	-0.001%
keyed_list	195.637	195.632	-0.005	-0.002%
mount_point	85.142	85.139	-0.003	-0.003%
nested_list	111.961	111.958	-0.003	-0.003%
node_refs	93.040	93.041	+0.001	+0.001%
password_strength	1548.270	1548.268	-0.002	-0.000%
portals	96.330	96.335	+0.005	+0.005%
router	317.870	317.645	-0.226	-0.071%
simple_ssr	152.245	152.249	+0.004	+0.003%
ssr_router	393.744	393.526	-0.218	-0.055%
suspense	109.150	109.143	-0.008	-0.007%
timer	88.337	88.337	0	0.000%
todomvc	139.156	139.155	-0.001	-0.001%
two_apps	86.135	86.134	-0.001	-0.001%
web_worker_fib	152.450	152.449	-0.001	-0.001%
webgl	84.828	84.828	0	0.000%

✅ None of the examples has changed their size significantly.

[futursolo]

This pull request also slightly reduces the bundle size.

Thank you for the pull request. LGTM.

[hamza1311]

Thanks for the PR! Looks good to me