[
{"name":"process_name","ph":"M","pid":1,"tid":0,"args":{"name":"worker 127.0.0.1:34749"}},
{"name":"thread_name","ph":"M","pid":1,"tid":1,"args":{"name":"running"}},
{"name":"thread_name","ph":"M","pid":1,"tid":2,"args":{"name":"waiting for inputs"}},
{"name":"inputs","ph":"X","pid":1,"tid":2,"ts":145.563,"dur":48.801,"args":{"object":9849393275780202497}},
{"name":"history::read_history(::String)","ph":"X","pid":1,"tid":1,"ts":194.364,"dur":687826.956,"args":{"object":9849393275780202497,"queued_after_submit_us":3.88,"dispatch_wait_us":11.72,"settle_after_end_us":174.163}},
{"name":"end","ph":"i","ts":0,"pid":0,"tid":0,"s":"g"}
]