add set_if_changed(Attributes) and hydrate(trait Apply) methods

[tikitko]

Description

Introduce an optimized hydration path for DOM attributes - skip unnecessary set_attribute calls when SSR has already written the correct value.

Fixes #4157

Checklist

• I have reviewed my own code
• I have added tests

[github-actions]

Benchmark - core

Yew Master

vnode           fastest       │ slowest       │ median        │ mean          │ samples │ iters
╰─ vnode_clone  2.458 ns      │ 2.845 ns      │ 2.462 ns      │ 2.489 ns      │ 100     │ 1000000000

Pull Request

vnode           fastest       │ slowest       │ median        │ mean          │ samples │ iters
╰─ vnode_clone  2.459 ns      │ 2.494 ns      │ 2.463 ns      │ 2.465 ns      │ 100     │ 1000000000

[github-actions]

Size Comparison

Details

examples	master (KB)	pull request (KB)	diff (KB)	diff (%)
async_clock	100.049	100.049	0	0.000%
boids	163.705	163.705	0	0.000%
communication_child_to_parent	93.456	93.456	0	0.000%
communication_grandchild_with_grandparent	105.574	105.574	0	0.000%
communication_grandparent_to_grandchild	101.890	101.890	0	0.000%
communication_parent_to_child	90.856	90.856	0	0.000%
contexts	105.854	105.854	0	0.000%
counter	85.740	85.740	0	0.000%
counter_functional	87.855	87.855	0	0.000%
dyn_create_destroy_apps	89.626	89.626	0	0.000%
file_upload	98.807	98.807	0	0.000%
function_delayed_input	94.439	94.439	0	0.000%
function_memory_game	167.365	167.365	0	0.000%
function_router	398.679	398.679	0	0.000%
function_todomvc	164.174	164.174	0	0.000%
futures	234.879	234.879	0	0.000%
game_of_life	100.396	100.396	0	0.000%
immutable	257.884	257.884	0	0.000%
inner_html	80.593	80.593	0	0.000%
js_callback	109.631	109.631	0	0.000%
keyed_list	175.731	175.731	0	0.000%
mount_point	83.949	83.949	0	0.000%
nested_list	112.602	112.602	0	0.000%
node_refs	91.449	91.449	0	0.000%
password_strength	1719.715	1719.715	0	0.000%
portals	93.081	93.081	0	0.000%
router	364.858	364.858	0	0.000%
suspense	113.553	113.553	0	0.000%
timer	88.258	88.258	0	0.000%
timer_functional	99.197	99.197	0	0.000%
todomvc	141.060	141.060	0	0.000%
two_apps	85.921	85.921	0	0.000%
web_worker_fib	136.158	136.158	0	0.000%
web_worker_prime	184.604	184.604	0	0.000%
webgl	82.738	82.738	0	0.000%

✅ None of the examples has changed their size significantly.

[github-actions]

Visit the preview URL for this PR (updated for commit 7fe55ee):

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[github-actions]

Benchmark - SSR

Yew Master

Details

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	291.449	293.654	291.786	0.667
Hello World	10	462.535	485.600	468.498	8.910
Function Router	10	31305.011	31815.069	31578.255	148.592
Concurrent Task	10	1005.993	1007.307	1006.681	0.438
Many Providers	10	999.761	1048.136	1011.873	16.259

Pull Request

Details

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	291.363	295.034	291.828	1.129
Hello World	10	474.704	497.274	484.033	7.154
Function Router	10	31607.399	32184.770	31840.534	173.487
Concurrent Task	10	1005.484	1008.879	1006.966	0.890
Many Providers	10	1032.042	1077.991	1042.607	13.399

[tikitko]

I checked Leptos - they skip setting attributes entirely on hydrate.
What do you think, guys?