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sra@ noticed that we're recreating this RegExp every time and we could just compute it once and store it in a static field instead. Change-Id: Iab2875d12295f0dc084aa1f0fb5e649b28c73c3b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/420165 Commit-Queue: Nicholas Shahan <nshahan@google.com> Commit-Queue: Srujan Gaddam <srujzs@google.com> Auto-Submit: Srujan Gaddam <srujzs@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com>