feat: add benchmarking script

[roflmuffin]

Baseline:

Benchmark Results

• Date: 2026-03-21T09:19:19.3384861Z
• Iterations: 1,000,000
• Warmup: 100,000

Mixed

Benchmark	ns/call	calls/sec	total ms
Mixed workload (4 natives per iteration)	334	2,998,359	1334.06

Primitive Args

Benchmark	ns/call	calls/sec	total ms
GetConvarFlags (ushort arg, ulong return)	377	2,651,967	377.08
GetConvarType (ushort arg, short return)	387	2,584,032	386.99

Primitive Return

Benchmark	ns/call	calls/sec	total ms
GetEngineTime (double return, no args)	269	3,713,182	269.31
GetMaxClients (int return, no args)	252	3,961,253	252.45
GetTickCount (int return, no args)	238	4,195,553	238.35
GetTickInterval (float return, no args)	229	4,357,633	229.48
IsServerPaused (bool return, no args)	319	3,130,564	319.43

Schema

Benchmark	ns/call	calls/sec	total ms
GetDeclaredClass via CBodyComponent (FastNew)	496	2,015,800	496.08
GetSchemaValue via Health property	110	9,093,000	109.97
Schema.GetSchemaOffset 4 different keys	90	11,094,503	360.54
Schema.GetSchemaOffset cached (record struct key)	190	5,255,720	190.27

String Push

Benchmark	ns/call	calls/sec	total ms
FindConvar (string arg, pointer return)	451	2,218,009	450.85
PushString long (2000 bytes)	2,587	386,591	2586.71
PushString medium (200 bytes)	884	1,130,827	884.31
PushString overflow (9000 bytes)	9,833	101,703	9832.57
PushString short 'sv_cheats' (9 bytes)	434	2,304,171	434.00

String Return

Benchmark	ns/call	calls/sec	total ms
GetConvarName (ushort arg, string return)	389	2,570,722	389.00
GetMapName (string return, no args)	239	4,188,841	238.73