perf: synth clean up

[laststylebender14]

Summary:
Briefly describe the changes made in this PR.

Issue Reference(s):
Fixes #... (Replace "..." with the issue number)

Build & Testing:

• [ ] I ran cargo test successfully.
• [ ] I have run ./lint.sh --mode=fix to fix all linting issues raised by ./lint.sh --mode=check.

Checklist:

• [ ] I have added relevant unit & integration tests.
• [ ] I have updated the documentation accordingly.
• [ ] I have performed a self-review of my code.
• [ ] PR follows the naming convention of <type>(<optional scope>): <title>

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.35%. Comparing base (9292577) to head (c63b7bd). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3059 +/- ## ========================================== - Coverage 87.37% 87.35% -0.02% ========================================== Files 275 275 Lines 27165 27171 +6 ========================================== Hits 23735 23735 - Misses 3430 3436 +6 ```

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[laststylebender14]

Before

Running 30s test @ http://localhost:8000/graphql

4 threads and 100 connections

Thread Stats	Avg	Stdev	Max	+/- Stdev
Latency	8.78ms	4.24ms	147.70ms	95.42%
Req/Sec	2.91k	421.56	4.09k	80.17%

347691 requests in 30.02s, 1.74GB read

Requests/sec: 11582.24

Transfer/sec: 59.45MB

After

Running 30s test @ http://localhost:8000/graphql

4 threads and 100 connections

Thread Stats	Avg	Stdev	Max	+/- Stdev
Latency	8.48ms	3.71ms	117.83ms	90.40%
Req/Sec	3.00k	390.17	4.14k	77.50%

358629 requests in 30.01s, 1.80GB read

Requests/sec: 11949.56

Transfer/sec: 61.33MB

[github-actions[bot]]

Bencher Report

Branch	3059/merge
Testbed	benchmarking-runner

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• Latency

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Benchmark	Latency	nanoseconds (ns)
from_json_bench	📈 view plot ⚠️ NO THRESHOLD	6,278,600.00
group_by	📈 view plot ⚠️ NO THRESHOLD	489.15
input/args.missing	📈 view plot ⚠️ NO THRESHOLD	22.79
input/args.nested.existing	📈 view plot ⚠️ NO THRESHOLD	44.18
input/args.nested.missing	📈 view plot ⚠️ NO THRESHOLD	37.32
input/args.root	📈 view plot ⚠️ NO THRESHOLD	39.36
input/headers.existing	📈 view plot ⚠️ NO THRESHOLD	32.24
input/headers.missing	📈 view plot ⚠️ NO THRESHOLD	31.87
input/value.missing	📈 view plot ⚠️ NO THRESHOLD	23.61
input/value.nested.existing	📈 view plot ⚠️ NO THRESHOLD	42.66
input/value.nested.missing	📈 view plot ⚠️ NO THRESHOLD	37.72
input/value.root	📈 view plot ⚠️ NO THRESHOLD	40.86
input/vars.existing	📈 view plot ⚠️ NO THRESHOLD	8.39
input/vars.missing	📈 view plot ⚠️ NO THRESHOLD	8.42
synth_nested	📈 view plot ⚠️ NO THRESHOLD	97,534.00
synth_nested_borrow	📈 view plot ⚠️ NO THRESHOLD	46,433.00
test_batched_body	📈 view plot ⚠️ NO THRESHOLD	1,886.50
test_batched_body #2	📈 view plot ⚠️ NO THRESHOLD	1,608,700.00
test_data_loader	📈 view plot ⚠️ NO THRESHOLD	395,980.00
test_handle_request	📈 view plot ⚠️ NO THRESHOLD	130,190.00
test_handle_request_jit	📈 view plot ⚠️ NO THRESHOLD	63,355.00
test_http_execute_method	📈 view plot ⚠️ NO THRESHOLD	15,082.00
with_mustache_expressions	📈 view plot ⚠️ NO THRESHOLD	1,086.10
with_mustache_literal	📈 view plot ⚠️ NO THRESHOLD	698.87

🐰 View full continuous benchmarking report in Bencher