94 строки
2.5 KiB
C#
94 строки
2.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using Xamarin.Forms.Internals;
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namespace Xamarin.Forms.Build.Tasks
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{
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[Preserve(AllMembers = true)]
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internal class PerformanceProvider : IPerformanceProvider
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{
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internal class Statistic
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{
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public readonly List<Tuple<string, long>> StartTimes = new List<Tuple<string, long>>();
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public int CallCount;
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public long TotalTime;
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public bool IsDetail;
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}
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readonly Dictionary<string, Statistic> _Statistics = new Dictionary<string, Statistic>();
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public Dictionary<string, Statistic> Statistics {
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get { return _Statistics; }
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}
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public void Clear()
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{
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Statistics.Clear();
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}
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public void Start(string reference, string tag = null, [CallerFilePath] string path = null, [CallerMemberName] string member = null)
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{
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string id = GetId(tag, path, member);
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Statistic stats = GetStat(id);
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if (tag != null)
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stats.IsDetail = true;
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stats.CallCount++;
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stats.StartTimes.Add(new Tuple<string, long>(reference, Stopwatch.GetTimestamp()));
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}
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public void Stop(string reference, string tag = null, [CallerFilePath] string path = null, [CallerMemberName] string member = null)
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{
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string id = GetId(tag, path, member);
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long stop = Stopwatch.GetTimestamp();
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Statistic stats = GetStat(id);
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if (!stats.StartTimes.Any())
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return;
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long start = stats.StartTimes.Single(s => s.Item1 == reference).Item2;
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stats.TotalTime += stop - start;
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}
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public IEnumerable<string> GetStats()
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{
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yield return "ID | Call Count | Total Time | Avg Time";
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foreach (KeyValuePair<string, Statistic> kvp in Statistics.OrderBy(kvp => kvp.Key)) {
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string key = ShortenPath(kvp.Key);
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double total = TimeSpan.FromTicks(kvp.Value.TotalTime).TotalMilliseconds;
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double avg = total / kvp.Value.CallCount;
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yield return string.Format("{0,-80} | {1,-10} | {2,-10}ms | {3,-8}ms", key, kvp.Value.CallCount, total, avg);
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}
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}
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static string ShortenPath(string path)
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{
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int index = path.IndexOf("Xamarin.Forms.");
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if (index > -1)
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path = path.Substring(index + 14);
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return path;
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}
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static string GetId(string tag, string path, string member)
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{
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return string.Format("{0}:{1}{2}", path, member, (tag != null ? "-" + tag : string.Empty));
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}
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Statistic GetStat(string id)
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{
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Statistic stats;
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if (!Statistics.TryGetValue(id, out stats)) {
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Statistics[id] = stats = new Statistic();
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}
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return stats;
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}
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}
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}
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