Calculation times in Log Analytics query

calculationtimes.kusto

let today = dependencies 
| where timestamp between( now(-1d) .. now() ) 
| where name == "CalculationCycle"
| project value , timestamp, hour=datepart("Hour",timestamp)
| summarize avg(value) by bin(hour,1)
| sort by hour asc;
let lastmonth = dependencies 
| where timestamp between( now(-30d) .. now(-1d)) 
| where name == "CalculationCycle"
| project value , timestamp, hour=datepart("Hour",timestamp)
| summarize percentiles(value, 90) by bin(hour,1)
| sort by hour asc;
today | join kind= inner (lastmonth) on hour 
| project hour, avg_value , percentile_value_90
| sort by hour asc