chore: group handlers

[rakita]

No description provided.

[github-actions]

Valgrind Results:

==4018== Cachegrind, a cache and branch-prediction profiler
==4018== Copyright (C) 2002-2017, and GNU GPL'd, by Nicholas Nethercote et al.
==4018== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==4018== Command: target/release/snailtracer
==4018== 
--4018-- warning: L3 cache found, using its data for the LL simulation.
Snailtracer Host+Interpreter benchmark (2.0s) ...            not enough samples
==4018== 
==4018== I   refs:      463,564,709
==4018== I1  misses:          3,432
==4018== LLi misses:          2,896
==4018== I1  miss rate:        0.00%
==4018== LLi miss rate:        0.00%
==4018== 
==4018== D   refs:      237,389,303  (160,565,579 rd   + 76,823,724 wr)
==4018== D1  misses:        323,550  (    183,722 rd   +    139,828 wr)
==4018== LLd misses:        137,538  (      4,061 rd   +    133,477 wr)
==4018== D1  miss rate:         0.1% (        0.1%     +        0.2%  )
==4018== LLd miss rate:         0.1% (        0.0%     +        0.2%  )
==4018== 
==4018== LL refs:           326,982  (    187,154 rd   +    139,828 wr)
==4018== LL misses:         140,434  (      6,957 rd   +    133,477 wr)
==4018== LL miss rate:          0.0% (        0.0%     +        0.2%  )