Tweaking Bor Performance

I am running a sentry bor node (no validator) using the “official” config settings (see here), with minor changes, since I am using IPC transport rather than HTTP/WS. Are there any further tweaks that can be applied to improve bor’s performance? In particular, I am noticing that transactions going through my node rarely make it into the next block, i.e. they usually take two or more blocks to be processed, even with above average gas price. This seems to be in line with this issue I’ve found on github.
Here is my configuration:

[Eth]
NetworkId = 137
SyncMode = "full"

[Eth.Miner]
GasCeil = 20000000 # gaslimit 20 * 10^6
GasFloor = 20000000 # gastarget 20 * 10^6

[Eth.TxPool]
NoLocals = false
#Locals = [...]
Journal = ""
AccountSlots = 16
GlobalSlots = 131072
AccountQueue = 64
GlobalQueue = 131072
Lifetime = 9000000000000 # 1h30m

[Node]
DataDir = "/ethereum"

[Node.P2P]
MaxPeers = 200
BootstrapNodes = [
    "enode://0cb82b395094ee4a2915e9714894627de9ed8498fb881cec6db7c65e8b9a5bd7f2f25cc84e71e89d0947e51c76e85d0847de848c7782b13c0255247a6758178c@44.232.55.71:30303",
    "enode://88116f4295f5a31538ae409e4d44ad40d22e44ee9342869e7d68bdec55b0f83c1530355ce8b41fbec0928a7d75a5745d528450d30aec92066ab6ba1ee351d710@159.203.9.164:30303"
]
BootstrapNodesV5 = [
    "enode://0cb82b395094ee4a2915e9714894627de9ed8498fb881cec6db7c65e8b9a5bd7f2f25cc84e71e89d0947e51c76e85d0847de848c7782b13c0255247a6758178c@44.232.55.71:30303",
    "enode://88116f4295f5a31538ae409e4d44ad40d22e44ee9342869e7d68bdec55b0f83c1530355ce8b41fbec0928a7d75a5745d528450d30aec92066ab6ba1ee351d710@159.203.9.164:30303"
]

And bor is started by this command:

bor \
  --bor.heimdall=http://heimdall-rest:1317 \
  --config=/usr/local/etc/bor/config.toml \
  --cache=49152 \
  --verbosity=0