perf: strip extra iteration when creating serde_json_borrow::Value

[meskill]

Summary:
Remove from_vec column in the base pr with reported flamegraph time around 1%

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>

[github-actions[bot]]

Bencher Report

Branch	3087/merge
Testbed	benchmarking-runner

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• Latency

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Benchmark	Latency	nanoseconds (ns)
from_json_bench	📈 view plot ⚠️ NO THRESHOLD	6,321,200.00
group_by	📈 view plot ⚠️ NO THRESHOLD	496.44
input/args.missing	📈 view plot ⚠️ NO THRESHOLD	23.04
input/args.nested.existing	📈 view plot ⚠️ NO THRESHOLD	43.76
input/args.nested.missing	📈 view plot ⚠️ NO THRESHOLD	38.10
input/args.root	📈 view plot ⚠️ NO THRESHOLD	39.33
input/headers.existing	📈 view plot ⚠️ NO THRESHOLD	32.67
input/headers.missing	📈 view plot ⚠️ NO THRESHOLD	31.79
input/value.missing	📈 view plot ⚠️ NO THRESHOLD	23.48
input/value.nested.existing	📈 view plot ⚠️ NO THRESHOLD	43.71
input/value.nested.missing	📈 view plot ⚠️ NO THRESHOLD	36.45
input/value.root	📈 view plot ⚠️ NO THRESHOLD	42.55
input/vars.existing	📈 view plot ⚠️ NO THRESHOLD	8.75
input/vars.missing	📈 view plot ⚠️ NO THRESHOLD	8.71
synth_nested	📈 view plot ⚠️ NO THRESHOLD	102,530.00
synth_nested_borrow	📈 view plot ⚠️ NO THRESHOLD	37,760.00
test_batched_body	📈 view plot ⚠️ NO THRESHOLD	1,932.00
test_batched_body #2	📈 view plot ⚠️ NO THRESHOLD	1,511,300.00
test_data_loader	📈 view plot ⚠️ NO THRESHOLD	389,250.00
test_handle_request	📈 view plot ⚠️ NO THRESHOLD	131,640.00
test_handle_request_jit	📈 view plot ⚠️ NO THRESHOLD	52,131.00
test_http_execute_method	📈 view plot ⚠️ NO THRESHOLD	14,840.00
with_mustache_expressions	📈 view plot ⚠️ NO THRESHOLD	1,106.90
with_mustache_literal	📈 view plot ⚠️ NO THRESHOLD	718.27

🐰 View full continuous benchmarking report in Bencher

[meskill]

Measured RPS difference with wrk

posts title

before

base pr

Running 30s test @ http://localhost:8000/graphql
  4 threads and 100 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     2.22ms   11.67ms 375.67ms   99.32%
    Req/Sec    18.13k     2.27k   24.50k    88.82%
  2169808 requests in 29.41s, 10.88GB read
  Socket errors: connect 0, read 0, write 0, timeout 99
Requests/sec:  73774.10
Transfer/sec:    378.66MB

serde_json_borrow without collect

Running 30s test @ http://localhost:8000/graphql
  4 threads and 100 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     2.08ms   10.60ms 491.21ms   99.36%
    Req/Sec    17.71k     2.57k   26.88k    86.25%
  2118269 requests in 26.84s, 10.62GB read
  Socket errors: connect 0, read 0, write 0, timeout 100
Requests/sec:  78910.31
Transfer/sec:    405.02MB

big query

base pr

Running 30s test @ http://localhost:8000/graphql
  4 threads and 100 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     9.10ms    4.07ms 109.28ms   88.04%
    Req/Sec     2.86k     1.09k   21.11k    98.98%
  334814 requests in 29.47s, 16.56GB read
  Socket errors: connect 0, read 0, write 0, timeout 100
Requests/sec:  11361.49
Transfer/sec:    575.43MB

serde_json_borrow without collect

Running 30s test @ http://localhost:8000/graphql
  4 threads and 100 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     9.71ms    5.49ms 161.93ms   92.07%
    Req/Sec     2.65k   448.89     4.28k    81.55%
  317553 requests in 27.82s, 15.71GB read
  Socket errors: connect 0, read 0, write 0, timeout 100
Requests/sec:  11414.88
Transfer/sec:    578.14MB