Coyote says its field-programmable gate array (FPGA) unit-test startup and Python-to-simulator communication are now 50 percent faster. The useful part is how ordinary the fix is: the test harness stopped sleeping for a full second while it waited for named pipes and began waking as soon as the simulator had data. Software plumbing can make hardware test infrastructure feel slow even when the logic simulation itself is moving quickly.
The change also lets a test skip its value change dump (VCD), the waveform file engineers open to inspect every signal over time. Those files are valuable after a failure, but recording every signal adds work to every passing test. A test can now disable the dump and keep the detailed trace only for cases that need it.
Coyote's number covers its own suite, so other designs won't get the same result automatically. Still, teams with simulation jobs that spend visible time between tool messages should profile the harness before buying more compute; fixed sleeps and unconditional waveform capture are cheap problems to remove.