set BenchmarkGroup

Co-authored-by: "Yingbo Ma" <[email protected]>

Author: shashi

benchmark/benchmarks.jl

@@ -52,6 +52,8 @@ let r = @rule(~x => ~x), rs = RuleSet([r]),
     overhead["simplify"]["randterm (+, *):thread"] = @benchmarkable simplify($ex1, threaded=true)
     overhead["simplify"]["randterm (/, *):thread"] = @benchmarkable simplify($ex2, threaded=true)
 
+    overhead["substitute"] = BenchmarkGroup()
+
 
     overhead["substitute"]["a"] = @benchmarkable substitute(subs_expr, $(Dict(a=>1))) setup=begin
         subs_expr = (sin(a+b) + cos(b+c)) * (sin(b+c) + cos(c+a)) * (sin(c+a) + cos(a+b))