Add copy for LinuxPerf.Stats and include perf stats when indexing into Trials

Author: Zentrik

src/trials.jl

@@ -2,6 +2,18 @@
 # Trial #
 #########
 
+# Move into LinuxPerf.jl
+Base.copy(stats::LinuxPerf.Stats) = LinuxPerf.Stats(copy(stats.threads))
+function Base.copy(thread_stats::LinuxPerf.ThreadStats)
+    return LinuxPerf.ThreadStats(thread_stats.pid, copy(thread_stats.groups))
+end
+function Base.copy(counter::LinuxPerf.Counter)
+    return LinuxPerf.Counter(
+        copy(counter.event), counter.value, counter.enabled, counter.running
+    )
+end
+Base.copy(event::LinuxPerf.EventType) = LinuxPerf.EventType(event.category, event.event)
+
 mutable struct Trial
     params::Parameters
     times::Vector{Float64}
@@ -40,7 +52,7 @@ function Base.copy(t::Trial)
         copy(t.gctimes),
         t.memory,
         t.allocs,
-        nothing, # There is no copy method for LinuxPerf.Stats or LinuxPerf.ThreadStats
+        isnothing(t.linux_perf_stats) ? nothing : copy(t.linux_perf_stats),
     )
 end
 
@@ -68,12 +80,18 @@ function Base.getindex(t::Trial, i::Number)
     return push!(
         Trial(t.params),
         TrialContents(
-            t.times[i], t.gctimes[i], t.memory, t.allocs, nothing, nothing, nothing
+            t.times[i],
+            t.gctimes[i],
+            t.memory,
+            t.allocs,
+            nothing,
+            nothing,
+            t.linux_perf_stats,
         ),
     )
 end
 function Base.getindex(t::Trial, i)
-    return Trial(t.params, t.times[i], t.gctimes[i], t.memory, t.allocs, nothing)
+    return Trial(t.params, t.times[i], t.gctimes[i], t.memory, t.allocs, t.linux_perf_stats)
 end
 Base.lastindex(t::Trial) = length(t)
 
@@ -145,11 +163,18 @@ function Base.:(==)(a::TrialEstimate, b::TrialEstimate)
            a.time == b.time &&
            a.gctime == b.gctime &&
            a.memory == b.memory &&
-           a.allocs == b.allocs 
+           a.allocs == b.allocs
 end
 
 function Base.copy(t::TrialEstimate)
-    return TrialEstimate(copy(t.params), t.time, t.gctime, t.memory, t.allocs, t.linux_perf_stats) # TODO: copy linux_perf_stats
+    return TrialEstimate(
+        copy(t.params),
+        t.time,
+        t.gctime,
+        t.memory,
+        t.allocs,
+        isnothing(t.linux_perf_stats) ? nothing : copy(t.linux_perf_stats),
+    )
 end
 
 function Base.minimum(trial::Trial)