added luau benchmark scripts

- dt_format.luau is used for the luau_multi benchmark
- turnaround_time.luau is used for the luau_script benchmark
- benchmark_aggregations.luau is used by the benchmark shell script to compute recs_per_sec and to aggregate mean to total_mean

scripts/benchmark_aggregations.luau

@@ -0,0 +1,26 @@
+-- this is the BEGIN block, which is executed once before the main loop
+BEGIN {
+    -- we initialize the variables here
+    total_mean = 0;
+    benchmark_data_rowcount=tonumber(qsv_getenv("QSVBM_ROWCOUNT"));
+
+    -- and setup helper functions
+    -- this one is to round a number to a given number of decimal places
+    function round(num, numDecimalPlaces)
+        return string.format("%." .. (numDecimalPlaces or 0) .. "f", num)
+    end
+}!
+
+-- this is the main loop, which is executed for each row
+work_var = benchmark_data_rowcount / mean; 
+total_mean = total_mean + mean; 
+
+recs_per_sec=string.format("%.0f",work_var);
+return recs_per_sec;
+
+-- this is the end block, which is executed once after the main loop
+END {
+    -- we return the total_mean here
+    -- note that this value is returned to stderr
+    return round(total_mean, 3);
+}!

scripts/dt_format.luau

@@ -0,0 +1,8 @@
+local date = require "date";
+
+createdate = date(col["Created Date"]);
+
+dayofweek = createdate:fmt('%a');
+hourofday = createdate:fmt('%H');
+weeknumber = createdate:fmt('%W');
+return {dayofweek, hourofday, weeknumber};

scripts/turnaround_time.luau

@@ -0,0 +1,11 @@
+-- compute Turnaround Time for NYC 311 Benchmark data
+local date = require "date"
+
+if (string.len(col["Created Date"]) == 0 or string.len(col["Closed Date"]) == 0) then
+    return
+end
+
+local t_sdate = date(col["Created Date"])
+local t_edate = date(col["Closed Date"])
+local t_diff = date.diff(t_edate, t_sdate)
+return t_diff:spandays()