Rework function diff view (fixes #12)

Cargo.lock

@@ -1181,6 +1181,12 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
+
 [[package]]
 name = "jni"
 version = "0.19.0"
@@ -1533,6 +1539,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "num_threads"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2819ce041d2ee131036f4fc9d6ae7ae125a3a40e97ba64d04fe799ad9dabbb44"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "objc"
 version = "0.2.7"
@@ -1582,6 +1597,7 @@ dependencies = [
  "rfd",
  "serde",
  "thiserror",
+ "time",
  "tracing-subscriber",
  "tracing-wasm",
  "winapi",
@@ -2081,6 +2097,17 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "time"
+version = "0.3.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c3f9a28b618c3a6b9251b6908e9c99e04b9e5c02e6581ccbb67d59c34ef7f9b"
+dependencies = [
+ "itoa",
+ "libc",
+ "num_threads",
+]
+
 [[package]]
 name = "tiny-skia"
 version = "0.7.0"