Add PrecompileTools workload for faster startup

- Add PrecompileTools.jl as a dependency
- Add @setup_workload/@compile_workload block that precompiles:
  - Algorithm struct instantiations (ode23, ode45, etc.)
  - buildDEStats function with typical MATLAB stats dictionaries

This precompiles the lightweight Julia parts of the package.
The main solve functionality requires MATLAB to be installed
and cannot be precompiled without it.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: ChrisRackauckas

Project.toml

@@ -6,12 +6,14 @@ version = "1.3.0"
 DiffEqBase = "2b5f629d-d688-5b77-993f-72d75c75574e"
 MATLAB = "10e44e05-a98a-55b3-a45b-ba969058deb6"
 ModelingToolkit = "961ee093-0014-501f-94e3-6117800e7a78"
+PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 
 [compat]
 DiffEqBase = "6.122"
 MATLAB = "0.8, 0.9"
 ModelingToolkit = "8, 9, 10, 11"
+PrecompileTools = "1"
 Reexport = "0.2, 1.0"
 julia = "1.6"
 

src/MATLABDiffEq.jl

@@ -3,6 +3,7 @@ module MATLABDiffEq
 using Reexport
 @reexport using DiffEqBase
 using MATLAB, ModelingToolkit
+using PrecompileTools
 
 # Handle ModelingToolkit API changes: states -> unknowns
 if isdefined(ModelingToolkit, :unknowns)
@@ -152,4 +153,33 @@ function buildDEStats(solverstats::Dict)
     destats
 end
 
+@setup_workload begin
+    # Precompile algorithm struct instantiations and buildDEStats
+    @compile_workload begin
+        # Instantiate algorithm structs - this precompiles their constructors
+        _ = ode23()
+        _ = ode45()
+        _ = ode113()
+        _ = ode23s()
+        _ = ode23t()
+        _ = ode23tb()
+        _ = ode15s()
+        _ = ode15i()
+
+        # Precompile buildDEStats with typical MATLAB stats dictionaries
+        test_stats = Dict{String, Any}(
+            "nfevals" => 100,
+            "nfailed" => 5,
+            "nsteps" => 95,
+            "nsolves" => 50,
+            "npds" => 10,
+            "ndecomps" => 8
+        )
+        _ = buildDEStats(test_stats)
+
+        # Also precompile with missing keys (common case)
+        _ = buildDEStats(Dict{String, Any}())
+    end
+end
+
 end # module