Simulator has global side-effect of disabling decoder cache

[arvoelke]

import nengo
import nengo_loihi

print(nengo.rc.get("decoder_cache", "enabled"))

try:
    nengo_loihi.Simulator(nengo.Network())
except:
    pass

print(nengo.rc.get("decoder_cache", "enabled"))

True
False

This means that a nengo-loihi simulation followed by one-or-more nengo simulations will no longer use the cache. This can be documented, or potentially relaxed by using

Simulator(..., model=Model(dt=float(dt), label="%s, dt=%f" % (network, dt), decoder_cache=None), ...)

to construct the individual simulators? Also note:

nengo-loihi/nengo_loihi/simulator.py

Lines 406 to 409 in 025cdf9

	model = nengo.builder.Model(
	dt=float(dt),
	label="%s, dt=%f" % (network, dt),
	decoder_cache=get_default_decoder_cache())

and:

nengo-loihi/nengo_loihi/builder/builder.py

Line 90 in 025cdf9

self.decoder_cache = NoDecoderCache()