fix(new-execution): return segments in execute_metered

[shuklaayush]

• also increased the max trace cells threshold to 2bn for now

[codspeed-hq]

CodSpeed Walltime Performance Report

Merging #1702 will not alter performance

_{Comparing feat/new-exec-e2-return-segments (6ca9110) with feat/new-execution (a7f81dc)}

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

✅ 10 untouched benchmarks

[github-actions]

group	app.proof_time_ms	app.cycles	app.cells_used	leaf.proof_time_ms	leaf.cycles	leaf.cells_used
verify_fibair	(-125 [-10.5%]) 1,062	334,008	17,675,804	-	-	-
fibonacci	(-371 [-14.8%]) 2,139	1,500,277	50,589,503	-	-	-
regex	(-329 [-4.5%]) 7,036	4,165,432	166,519,456	-	-	-
ecrecover	(+16 [+1.2%]) 1,405	289,547	(+43030 [+0.3%]) 14,513,216	-	-	-
pairing	(-70 [-1.6%]) 4,427	1,820,436	(+346586 [+0.4%]) 96,178,993	-	-	-

Commit: 6ca9110

Benchmark Workflow

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #1702 will not alter performance

_{Comparing feat/new-exec-e2-return-segments (6ca9110) with feat/new-execution (a7f81dc)}

Summary

✅ 10 untouched benchmarks